[soah]

If your hand is good you win the contents of the pot regardless of your river action. Getting called for $8 wins you an additional $8, not $24. Although this assumes your opponent will never steal the pot from you when you check.

But I have a very hard time believing that you lose 75% of the time. The guys that call full pot on the turn on a draw are the same ones that call down with just a pair. If five people saw the flop it would be different, but against a single opponent you run into a pair far more often than you run into a monster.