Another point though is that, when you "fight" someone else, all you do is try to maintain your equilibrium. Dan has said this before as well. Its all about "you" and you alone. You have no time to be worrying about your opponent and setting him up really.
So as you "equalize" your body and consequently neutralize your opponent, youre automatically adjusting your "ki" with respect to your "opponent".
I like this statment, I have recently begun to think of technique as simply being a way to 'correct' the disruption to your structure that is caused from someone's attack, and that 'correction' is what powers the 'chosen' technique; regardless of what technique we are talking about.