Product designed by men for their dumb little wimmons.
Paxton Quigley came out with a bra holster once. (shrug)
I do see some potential upsides to that kind of carry. It's in a woman's personal space not likely to be bumped or felt in a public situation. It's got just about the most retention/defensibility, being right in front and between the arms. And it's always accessible, standing, sitting, or driving etc.
So from a first look standpoint, I could see it making some sense, assuming the woman in question is either too endowed, or too little to make it practical.
However I 100% agree that I'm willing to leave it up to other women if such a thing REALLY is practical, comfortable, or desirable.
Although if I can't get out of my current love-hate relationship with carbs, I may well soon be qualified to offer an opinion on the matter too.