[Cerril]

Like you said, in that case both players are playing the same before and after, so you're really not winning a larger share of his money in that case postflop; what you're really doing is splitting everyone else's money. Some of them, though, might also have made the theoretical right decision based on the exact same idea.

Chances are very good though that if they could have seen everyone's cards, some people shouldn't have been in the hand to the flop. Most of their money gets split among everyone else. That's where the FTOP comes in.

That's one of those things though, even at the end, if someone made the right decision the whole way and loses then you aren't really winning any of their (theoretical) money, since if it got replayed an infinite number of times they'd win precisely their share, which would be equal to or larger than what they lost to you.