That's one way to put it. Often nobody has anything that would be playable in a full ring game. The button is paramount, almost like having the serve in tennis.

That's one way to put it. Often nobody has anything that would be playable in a full ring game. The button is paramount, almost like having the serve in tennis. Also, HU LHE is (much) more complicated than full ring. You have less knowledge about your opponents range, not more. You have to play more hands, a wider range of hands, and you frequently need to make marginal decisions.