You're right. Often that's exactly what happens. But, I think in the long run, you lose more chips than you could have gotten if you'd strung them out.
A perfect example is AA. Everyone says never slowplay AA. Do they know what this really means?
AA is 78% against one hand. 72% against 3 hands. Down to like 48% against 6, I think. Something like that. Even if you are up against one other player everytime, almost 1 out of 5 times you are going to lose. They aren't bulletproof. So, why be shoving all your chips in when you get AA? Because you're afraid of that 1 out of 5 times that they inevitably lose. So, use that to your advantage. Raise to the point where you only get one or two callers. Make 'em pay the admission price. The flop comes XXX rainbow. Most guys shove a lot of chips in, hoping to win the pot right there. Why? Afraid somebody will draw out on them! If the opponent gets a piece of the flop, he's 22:1 to catch trips. He might get runner-runner flush or straight. I'll take that action every time. I want all his chips, not just what's already out there. What you do NOT want to do is let a whole bunch of people draw against you.
Didn't we play a hand like this? I know one time today I mini-raised with AA and got cracked. It happens. One out of five times. But, if you stack up all the chips I've lost with AA versus chips I've won--even disregarding the chips I would have won by fast playing or raising them out and just winning the blinds--I'm pretty confident which is the bigger stack, by a bunch. I lost only chips I would have lost anyway. It happens. Maybe it wasn't you, but somebody said I shouldn't slow play AA. I didn't. I just tried to get more chips into the middle, knowing I'd be heads up against the BB and/or SB. 72% against both, knowing only one of them at most is going to be against me at the turn.
That's my point with this post. A good player is thinking, "how can I get the most chips?" An inexperienced player is thinking, "how can I win this right now?" A good player is thinking, "do I need to win this right now?" (A fish is thinking, "oh, boy, I have a pair!!!")
I could be wrong, but I don't think so much. At least somebody took me to task, and I appreciate that. I really assure you, this is the right way to play. Trust me.

CJ