I think the biggest problem with respect to viewership among Americans is the continued proliferation of the myth that tens of millions play pool here. It's only true if you include all the casual bar table eight ball players.
Almost none of the casual players play 9/10 ball and, for that reason, few are interested in watching it. For years, I went to the BCA Championships at the Riviera in Vegas, which always ran at the same time as the BCA Open 9-ball event. There were 10,000 amateurs within a hundred yards of the pro event, but very few of them ever attended the pro event. At the heart of pool's lack of viewership is the giant disconnect between the pro and amateur ranks. The pros had easy access to 10,000 amateurs, but as a group, they rarely spent any time in the amateur tournament rooms.
The amateurs don't care about the pros, in part because the pros don't play the game that the amateurs play. With just a few exceptions, the pros don't care much about the amateurs either, and this disconnect is something I've observed for decades.
The biggest issue in the game is the disconnect between the pros and the amateurs. Few amateurs play the games that the pros earn a living at, and that means that the potential viewer base is much smaller than many seem to think.
Your observations are 100% accurate. Not sure about the conclusions though.
But let's focus on that disconnect or divide. I think divide is a better word.
In pool, there's amateurs, and then there's the pro realm. There's just about no in between. I'm not talking skill level necessarily. Talking about community and culture. You nailed it on that.
I've seen both sides, and they are radically different worlds. There's only a tiny handful of people, some of which are the types who come on this forum, who have observed or hung in each of these distinctly different realms.
Why this situation exists could be a long, speculative discussion. But it is real. I will speculate by saying simply - there's no incentives or natural reason for either group to interact with the other.
Here's the long version.
Amateurs as a whole, could care less about pro pool as it doesn't serve them in any significant way. Not even for instructional purposes in most cases. Pros could care less about amateur pool, as there's not much to be gained there for them. Practically speaking, there's no pro-pool in the USA right now RELATIVE to the size of the billiards industry (which isn't a small industry actually). Meaning that, even if the pros went completely extinct, the billiards industry and amateurs players would continue to exist.
Thus, pros are irrelevant. They really are. In the US, does anyone even care about pro darts? There's dart leagues and competitions. There's millions of casual players in bars. Pros are irrelevant there too.
The only interaction you see between pros and amateur is promotional. Much like how it is in other sports. That is, pros get sponsored by equipment manufacturers so that the amateurs who actually do follow them will buy that gear. Simple. Common stuff there. In pool, there's not much a pro has to do other than wear the logos on their shirts. Not a whole lot of actual promotion. Only the very elite sponsored by the big companies have to do a little, and it pales compared to say golfers who do a lot more with their sponsors.
But that's a minority for pool. It's hard for those of us deeply into pool to put it into perspective (we do get lost in our own world), but the majority of players and the industry aren't like us. Most players do not play with ANY of the major cue brands. Most players, if they buy a cue of their own, buy many of these sub-$100 brands like Players.
There are many times more people who own pool tables in their home than who play in leagues or follow any kind of organized pool. I meet them all the time. One guy recently at work. Classic example. Was talking about his man-cave. Has an 7 footer in there. I asked him if he ever shot in any leagues. Answer: no. Asked if he ever went to any pool rooms: Answer: no. Followed by why would I do that when I have a table. There's a lot of people like this. That is how the billiard table manufacturers survive and do business. The biggest part of their market are not enthusiasts who play league, go to pool rooms or follow pro pool. Just because you might have a dart board on the wall of your garage doesn't mean you're in a dart league, or you tune into British TV stations to watch the pros battle it out.
Been to a recreational supplies store where tables are sold? You rarely if ever see a Gold Crown or any kind of pro or commercial grade table. You rarely if ever see any 9 foot tables, these are special order in most stores. It's endless types and styles of 7 and 8 foot furniture style home tables of low to medium quality.
Thus, even in terms of selling gear, the industry doesn't need pro players that much. Which billiards industry companies do the most sponsoring? The ones whose business model it is to sell high-end gear. Let's pick on Predator. The overwhelming majority of people who hit pool balls in the USA, who are not in leagues, watch pro pool, or go to pool rooms - will never buy a Predator shaft or cue. In fact, most have no idea what they even are. Most homes with some type of pool table have cheap house cues.
Let's put it this way....Brunswick isn't saying to themselves "oh no, we better get Shane and several others signed up quick, or the masses will go with our competitor and we'll be taking heavy losses" ...The masses of players could care less. Most of the industry doesn't hinge on having pro-level endorsement.
In short, a person who plays pool is distinctly different thing than a pool fan.
I was naive about that a long time ago. I thought that anyone who spent the money on a pool table was automatically an enthusiast. Seemed logical. Just isn't the case. All kinds of people put tables in their homes and they are no more an enthusiast of pool than owning a kitchen knife makes you a culinary enthusiast who watches Food Network.
Anyway -
Regarding the game of choice - the IPT experimented with providing the game of the masses (8-ball) and it didn't work out.
I don't have the answer, but one thing is for sure - pool is one of those games that people prefer to participate in rather than spectate. Three reasons why. Pool is reasonably accessible, thus most anyone can play. Pool is FUN. And pro pool is, well ...other than for the hard core enthusiasts, boring to watch for the masses. It lacks suspense, drama, conflict, high excitement and the dynamics of colorful characters interacting with one another. Other sports have that, by design. Most other sports are entertainment first, competitions second. Pool is very much all competition and about zero entertainment.
Shane is playing Jayson, live stream. Most pool players could care less. They are saying to themselves, wow these guys are amazing. Pros are great. They appreciate it, but why am I watching these guys when I could be hitting balls myself? And that is just what they do. I have seen live streams played in pool rooms when there were mainly league players present. Almost no interest. More interest than the general public renting tables who are completely oblivious to what is on the screen...but not much more.