Pool is rather unique among sports.
Let's face it. Football, MMA, boxing, etc. are "exciting" and popular largely because we've been taught to enjoy violence.
I suppose we could have Rodney punch somebody out on camera, instead of just threaten someone. We could encourage a few players to break their cues on TV when they miss. We could have them start fights over who might be gay or whatever. This wouldn't be pool, but I wouldn't be surprised to see this...if it sells the advertisers will make sure it happens.
A run through the channels on TV will show (in addition to commercials) screaming arguments between talking heads, people blasting each other away with automatic weapons, cops slapping around suspects, and fights on football and baseball fields and basketball courts, shown over and over on ESPN. "Exciting", for sure.
I've actually been told that I'm not a patriotic American (seriously) if I don't support football, hockey, etc. Sorry, but I prefer non-violence in my sports and my everyday life.
I doubt that you're just looking for more violence. It sounds to me like you just prefer baseball and football to pool, and that's your right. For those who prefer pool, a great shot is every bit as exciting (for me more so) as a home run, or a 60-yard pass. Oops, sorry I broke your rule about not saying that pool is exciting to some.
Pool is pretty popular, in fact one of the major participation sports. It isn't more popular because it's not an established money-maker for corporate America.