I haven't had access to sport shots in a decade. However, about 4 years ago I joined a normal THS league, local to me, and the manager is a gentleman who retired after 40 years in the industry in Ohio and moved south. Old-school guy to the core; I bought his AMF sidewinder drill press from him.
My average immediately dropped 30+ pins when I started bowling on his league. Why? The shot was quite flat, long and heavy. League nights were tough. But they made me a better tournament bowler.
Just this year, he's backed off on the difficulty a tad (I'm back up about 15 pins, certainly not all 30 that I was down), at the behest of some of our older bowlers who can't rev it up as much anymore. My point is I have 67 bowling balls in my drill room right now and all it took to make me look average again was an oil man.
The houses could rein in scores tomorrow if they wanted to. They just don't want to. If the USBC starts fiddling with the equipment, scores will come down and the bowlers will blame the house. That's not conducive to increased business.
I've been saying this same thing for 20 years now: Scores are higher across the board, that's life, accept it and move on. Create a new normal for judging talent, just like we have over the years in golf and baseball as fitness, weight training, equipment changes, etc., had their effect on the game. Why bowling believes it has any right to be different speaks to the rank arrogance of the people who see themselves as "gatekeepers."
Aside from the intramural leagues I bowled on as a college student, I've never bowled without certifying. If the USBC truly is about to go down this path, I won't give a da*n if I ever certify or bowl in a tournament again.
Jess