With bouldering, the set of moves is fairly limited and what actually prevents someone from pulling harder comes down to flexibility, core strength, and contact strength.
Well if we're talking about "wall climbing", the set of moves don't expand that much as one progresses. Your technique needs to be more efficient and your transitions and balance on point, but it's not like there's a esoteric 13a move that a 10d climber hasn't seen. Sure the first time someone dyno'd on a roped climb was a sea change.
Bouldering arguably has a larger set of moves than "wall climbing", but again the physicality of this sport is the crux for most people. One can study and maybe drill all the "advanced" moves, but without the flexibility and strength to execute on microholds, that knowledge is useless.
This is about wall climbing where there's lots of choice for moves.