You stand in the normal side on position your head is over the end of your toes.... with a big potential to tip over.
You then move your back foot back and across without moving your head like you say. As a result your head is not over your toes but in between your bfopot foot and back foot .... so you would have to have a serious physical disability in your neck or head to tip your head over from here
So here is the issue - your head controls where your feet go, not the other way around as you play the shot, whether that is a front or back foot shot.
I think you are talking about players who fall over through the shot because they have got their head outside the line of the ball. This is a common fallibility, however, in my view it is exacerbated by a poorly executed trigger movement and the ensuing loss of balance, as I referred to above.
If you move your head in line with the ball, then forward or back, your feet should naturally move into the right position. Douglas Jardine describes this as "the topple" but that is a little old school, perhaps for some.
I stand by what I say - if you keep it simple there is far less that can go wrong.
If, for example, you are planting your front foot it is because you are not moving your head/eyes in line with the ball and then towards it, with your feet "falling" into place - what you are doing is moving your foot first into an incorrect position.