I dunno who's saying that johnny... but really it sounds like one guy's opinion and not 'common knowlege' or the 'general concensus'.
Something I hear all the time is that many serious 9b/10b players favor tight pockets.
That's probably because those games favor pure shotmaking ability. They are not thinking games. They are pure execution.
So any guy who is in love with his own shotmaking skill... he chooses rotation games that show off that skill. How's he gonna do Corey's super monkey draw shot, playing 14.1? There's no opportunity to show that off. So the shotmaker plays rotation games. And he says stuff like "yeah I can't stand regulation pockets. Makes the game too easy. I fall asleep shooting into those buckets." Which, to be blunt, is horseshít macho posturing. Just my opinion, no offense intended
Guys who love the other aspects of pool, like careful planning or tactical decisions, don't feel the need to turn it into a straight shooting contest by shrinking the pockets. So it's not that 14.1 players insist on 'big' pockets. They just don't feel a burning urge to play their game on nonstandard equipment.
Rotation games can be very tactical. The safety play in 10 and 15 ball by the upper skill level player w/o use of jump cues can win matches. IMO the tighter the pockets in rotation and no jump cues bring out more of the defense in the game. The top rotation players that play 14.1 once or twice a year play the game horribly but still get into the semis and finals anyway against players that play the game 100's or 1000's of times a year. Johnnyt