Kaeser makes some good points. To elaborate a little:

Let's say you sit down in a game with nine other players. Each of you has an even stack of 1000 chips. You win the first few hands, and run your stack to 1900 while everyone else is at 900. Now, let's say you play suited connectors and flop a straight draw or flush draw. If you move all-in and lose you'll effectively be starting over, which, as a good player, you could rely on building back up. If you win, you'll go to 2800 chips (or more), make a player either leave or rebuy, and put yourself in position to dominate the table the rest of the night. In this way, it's similar to Doyle's style of always having a big stack in a game he plays in. If you're a very good player, then always playing a hand after taking a pot can be a good strategy to go for a huge win.