Well, look at the attached image, feet are still parallel, but independent sides of the body have formed structurally sounded force bridges in each direction. Central axis is still even vertical. No leaning, no loss of posture. But forces are no longer going where we would have otherwise expected. And this is just external. And this is from Greco-Roman wrestling (not what you were thinking
). As I said, imagination about setup.
There are other reasons to turn stance slightly sideways, that have nothing to do with balance. Making a smaller target for strikes
. But at the same time, you trade the opportunity of having equal distance to launch an attack from either side. I find myself using either to taste.
Agreed. I do not however do not get what you try to explain with the attached picture. Feet are still parallel? I see one in front of the other, and of the floor??? This person is pushed over easily. Can you please elaborate a bit? I would like to understand what you mean.