I don't think the tighter pockets have anything to do with it. At least in pool rooms. When it comes to practice.
You go to the local pool room, without a doubt, THE TIGHTEST TABLES IN THE ROOM, HAVE THE ABSOLUTE WORST PLAYERS ON IT, playing one pocket or 9ball with 20 innings per game. LIKE THEY ARE CHALLENGING THEMSELVES ON HOW BAD THEY SUCK.
This is absolutely everywhere and as far as I am concerned, the standard.
So much so, that I think good players just don't even bother with tight equipment. Especially given the fact that no one wants to deal with garbage players who gatekeep the tight tables if you end up with a game wanting you to pay their table time to get off the table or wanting to finish their game that takes another hour.
If the entire room had 4' tight pockets, that's a different story, but where does that happen?
And 4' tight pockets with diamonds and that extra shelf is a total snoozefest to watch. By far, the stupidest pool I have ever watched. And no, I'm not talking about new cloth. I'm talking bout the other 51 weeks of the year that the cloth is old.
No dynamic creative aggressive pool play.
Pool players dribbling balls in the hole and winners being determined by who hung up the ball in the pockets more than their opponents, on shots that need some pace for position that literally can't go.
I think American pool players are in their own little world where the majority feel world class, but don't put in the time. Especially when you don't have to practice or prove yourself because you know your buddy is going to pick you anyway.