Yea just like it's hard to bring in the psychological element to the game. For example, Ryan Howard strikes out ALL the time in real life. But since I personally have good plate discipline, I can play him to be way more disciplined and as a result, he has way higher stats than he does in real life.
It's impossible to bring these factors in. I know clutch sort of does but it doesn't capture everything. I think they just rely on the player to add that psychological factor based on how he plays. For example, sometimes I just get in a hitting slump just like real players do at times in the real game.