While I agree that this law is dumb, I don't think these clothes are the 'desired clothes' that most women would choose on their own with no outside coercion. Many Islamic women wear these kind of clothes because of the intense pressure put on them to do so from their friends, family, and peers. If they dress differently, they are shunned and shamed.

I will concede that some woman out there would maybe choose to wear that on their own with unlimited choices, but the rest of the world and history has shown that women don't tend to want fully cover themselves from head to toe when given other options, unless it's cold out.

This law will do nothing to help that problem at all, though, and it will probably only act to make that pressure stronger as a pushback. It's not just Islam that does this, either. Many other religious institutions put this pressure on their women.