I'm my opinion...
The reality of bowling is: Less than 1% of the total bowling population want tougher shots as their weekly house shot.
If there are 3,000,000 total sanctioned bowlers, that means 30,000 nationwide want tougher shots.
But in reality, I bet, 2,000,000 don't really care or notice what the shot is or can really take advantage of a THS anyway.
The other 970,000 want it as easy as possible and will probably quit if you make it harder. Why? Because they are young or started bowling in this era. They think and believe this is what bowling is.
Now, you are in charge of a business, or you are in charge of usbc. Who are you going to cater to? The 30,000 or the 970,000? Looks like a easy decision to me.
You cater to the 970,000 while providing programs and opportunities (tournaments, sport bowling) for the 30,000 who want it. You will never mandate it, because, if you do, the bulk of the 970,000 will quit. If the 30,000 number ever grows, then the program grows with it.
You can argue that ABC/USBC should have never allowed this to happen. Too late. Pandora's box is open. It will not ever be closed. It will be too costly to the bottom line of businesses for too many years to built it back.
This is bowling's reality in my opinion. Embrace it. Do what you can to improve it. But complaining about what they did wrong will not improve it now. I do not believe turning back the clock is the answer. No sport/game I know of has ever thought that was the answer. Bowling needs to look forward not back.
At least in my opinion.