> That amount of squatting will help you about as much as walking to your nearest bus stop every day

With general fitness, sure.

With squatting form, though, that kind of low-volume but regular practice once the movement is established will do quite well at maintaining it.

Squatting doesn't hurt Western ones because of poor general fitness, but bad form.

It's not that squatting, in general, is helpful. It's that if you don't squat, you lose the ability to squat comfortably. I was initially responding to a comment about squatting blowing out knees, which doesn't seem to be a problem in regions where adults continue to squat some of the time.