Women's clothes don't have pockets. Always having an active LTE modem strapped to my wrist makes me feel safer. It is easy to be separated from my phone because I don't have pockets.
I suspect it's something really subtle along these lines: Beautiful women can often get by being useless, so women in general acrew certain trappings of uselessness so as to associate themselves with beauty.
It's sort of like men and commuter pickup trucks (trucks are associated with hard-working men, so men buy trucks and drive them around town, even though they have no hard work to do).
And aesthetically, a pocket stuffed with things, especially in more form fitting clothing, doesn't look good.
Actually, adding pockets to women's apparel might be a decent side-gig business....