It is supported, it's just that I can't do much to fix that problem. See, in
BG1 female humans had a completely own scaling system. Warriors would go with the human sizes (which work for all human males as well), while other human women had the elven scaling system (i.e. were smaller). Now, in
BG2 someone set all human women to the male scaling system, so we (I) have a problem.
While the hands are on the same level on both systems (luckily), the same thing cannot be said about the heads. The human fighter, as its taller, logically has a "higher head". Now when placing the helmets, I have to make sure it fits everyone, so i'll have to go somewhere in between. I'm afraid it'll fit neither perfectly. This isnt obvious normally, but with that specific helmet and human female fighters I agree it looks quite odd. I may address this in a future patch. I already had to edit most of the human paperdolls directly to kind of solve the problem above, so it won't be very hard to fix this.