I'm saying that one's skill in a sport is the same no matter what game they are playing in and the differences between certain games is due to natural random variation from game to game that happens in all sports and also due to situations out of that players control. There is no big game winning skill. A worse quarterback is still the worse quarterback no matter what game he is playing in all other things being equal. There is no clutch ability because players would play better already if they could. To think otherwise is illogical enough to almost imply that they player must have virtual magical powers to play better in curtain games.
Basically, when somebody that's worse does better in a small sample of games (or even in a greater number of games), it's because of luck due to being on the fortunate side of random variance, or there being outside circumstances other than their skill that isn't equal (like playing on a better team, playing against easier opponents, or having more favorable matchups, among others) and benefits the worse player more than the other better player, or both.