Yes it does, but after a while (& too many) your bowls are the same

.
If you believe Kevin, he was building a sellable IPT business to the guy who wanted to do off-shore betting that didn't pan out due to change of laws. His plan was to make money, not simply donate to the pool world. But he ended up doing just that and some made some nice coin in the process. It was
exiting for a couple years.
Passion, in my opinion, is why the players choose to become players. It's not a long term business decision. I think pool chooses them as much as they choose pool. It is very hard to get to the level of play to decide to gamble and/or play tourneys for your living, although some get there at a very early age. The biggest allure is the $1,000s of dollars that could be made at an early age - it's hard to work at a job for $10/hr to put yourself through school when you have the ability to earn as much as your professors (if you don't factor in your loses

).
Many do not have the level of passion to choose that life, because the force has to be strong, so they get jobs, go to school, and play pool their whole life as a fantastic hobby. This probably happened to many of the forum members including me.
What could be worse than choosing pool as your sport of choice (if it's a sport), to dedicate your early life to get very good at it, with the possibility of greatness to where you would be forced to make the choice to go full-time or not? Try getting good at 3-cushion billiards at an early age

. Very little gambling opportunities and very little money in tournaments in the USA.
But the underlying theme is
passion! If it's strong enough, you play; it's as simple as that. Your choice in time is whether you work while you play or dive in head first. Those listed above are getting rewarded for being their own bosses (unless married).
Thanks for posting these figures, it is very interesting.
Dave