The secret is as Warren Buffett says (with regards to investing):
I don’t look to jump over 7-foot bars: I look around for 1-foot bars that I can step over.
And Mike Caro (from Super System 2, chapter 5 – Tips from Mike Caro University, Tip 14):
Beating strong foes wins much respect and little money. Beating weak foes wins little respect and much money.
And this is why poker is an immoral game. It’s the sharks looking for the fish who they can clean out. The winners are like the pool hustlers who search out players worse than them and take their money without these people realising what they’re getting themselves into or who can’t control their gambling addictions.