Pretty much what I expected you'd say. Which you know quite well isn't contradictory to what you were trying to contradict.
Unh huh... Sure. That's a real funny way you've got of apologizing for a straw-man.
Punch farther, and you're easier to off-balance. Punch farther, and if they don't move, you're not in the prime power zone with many strikes. Punch farther,
This is going to amaze you... I mean, totally blow your mind. It's apparently a deep secret that the martial masters have been keeping from you, but I'm going to clue you in.
Hit X will go farther through the target if you are closer to the target when you throw it.
I know. It's hard to understand, much less believe; but if you make, say, a right cross where your fist ends up 3' from your center, whether that fails to connect, smacks the surface, or pushes through is depending on whether the thing you are hitting is farther than 3', at 3', or closer than 3'.
So it turns out you aren't "punching farther" and there's no new balance issues involved. The problem existed solely in a lack of imagination.
and if they move up a tad, the punch is effectively jammed.
SMH
Apparently everyone has been keeping many secrets from you. I may lose my decoder ring for outing them, but I'll tell you another.
Turns out there's a range in which a given hit is effective.
In fact, if you look at an art like Systema; they'll actually teach a single movement that's a shoulder strike, an elbow, and a punch letting the distance to impact dictate which.
While something like boxing doesn't go to that extreme, most non-hooking punches work from just outside the clinch all the way to almost the end of extension. This is because much of the actual force is generated in the legs and hips.
Of course jamming is *possible*; but your approach turns a perfect hit to a complete miss with 1" of error; where mine (and everyone else I've seen) gives you at least a foot.