To put into perspective what a THS can do for you, I had a kid I bowl with on Saturday mornings this year shoot a 268 his first game, and then continue on to shoot a 550 set.
Your right, sport bowling is not for everybody, its for the people who take bowling seriously, they don't treat it as a "game" or as a night out, they treat it as a sport, in the same way baseball players treat baseball, and hockey players treat hockey.
While you certaintly cannot completely do away with THS leagues, its simply suicide to the house owner, I do feel that sport bowling should be more available to the people who want it.
I know im nothing special when it comes to bowling, although with some good practice I think I could be, but I very rarely get the opportunity to bowl on some tough shots. There are no fall PBAX or Sport leagues in my area. There are a few over the summer in houses that are not too far away, but in the fall there are none, and very few tournaments utilize sport patterns.
You cannot do away with the THS, but to say that Sport Bowling is stupid is just as ignorant.