The only races where race locked equipment makes any sense whatsoever are Miqo'te and Au Ra, and in both cases solely because tail accessories don't work on other races due to a lack of tail.

The rest goes into the category of the insanity:"By every measure of science you should be able to put it on, but you can't."
Which is often countered by the size fitting argument. Meanwhile, we're casually refitting the Legacy Warrior armor made for a freaking Lalafell to fit a Roegadyn in a rising quest. Because we have the technology.

I don't mind designing gear with particular cultures or body shapes in mind, but it just doesn't make sense to restrict it to them. That's just the bunny suit for males all over again.