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OK, AOK, I see your point. Let's say you have position on me and a set of 2s on the flop. I have TPTK holding AK and bet the pot, say 5BB. You'll flat call. I'll look down at my little cheat sheet and see that you only play 15% of hands. If I don't improve on the turn, I'll bet another 5BB, you'll raise and I'll fold.

Sure, you win. But you don't win much because I had you pegged as a rock. I don't consider 10BB to be "paying you off." You'll be breaking even on the last few rounds of blinds.

If your % at the flop is less than mine, I'll give you the benefit of the doubt. Granted, I'm not going to be your typical opponent. But the online forums are crawling with such people.

BTW, you may be right that a pot-sized raised bet on a loose table may be wasting money, because some fish will overbet the pot anyway. I think Phil Gordon once said that the "Bet Pot" button causes many players to blow away chips.