Taiwanese women who wear a veil

I've noticed recently that more and more women are wearing sun visors in this position like a welder's mask or a veil. I once saw an attractively-attired woman with her visor down so that you couldn't see any part of her face. She looked like some kind of ridiculous she-cyborg. There are the mask-wearers too. Ostensibly, they are worn to keep away germies and other airborne nasties, but I'm not so sure that's the only reason. Some women seem to wear a mask (plus sunglasses) pretty much the whole time they are outside. I realize that many of these veiled women have spent a fortune on SKII and other expensive skin-whitening products and want to protect their investment - god forbid they should ever turn brown - but I'm convinced there's more to it than that. They are hiding behind a veil, an Asian Niqab, if you like. The reason I think they are hiding is based on my observation that attractive Taiwanese women, especially those dressed sexily, usually have a look of irritation on their face and appear to be in a hurry to get somewhere, or just away from "here". (Maybe it's just me that has this effect on women! ) So masks and visors provide the perfect way to hide, with the pretense that it's for "cosmetic" (irony alert) reasons. So what's the big deal? I don't know. It bugs me. Why are they shutting themselves off from the world in this way? I have no problem with people wearing sunglasses, but to cover the whole face,... it's odd, and I hope it's just a passing fad.