Doesn't help that the 'sexy dimorphism' trope where males are outright furries/monsters and females are "human with animal ears/horns" is also a
very popular trope in anime and rpgs - Neko and Kemonomimi are in on itself a popular trope for japanese audience, afterall... a trope that is already quite saturated with Miqo'te and Au Ra, Viera just being the cherry on top.
To show a few examples:
The only exceptions to this rule seems to be when the men are meant to be just as beautiful and elegant as the women, once again, Miqo'te, Au Ra, and now Viera, so this whole men=beast is only played for the type of brute or big men....and where do Hrothgar fall in this, I wonder...? exactly
That said, aside from
maybe popularity, Hrothgals having a more humanoid face would likely be reduntant regarding the whole hat/hairstyle fiasco anyways. I mean, Viera are in the same boat, and they're literally just another
'human, but with-' race. If they're going to "fail" either way, might as well stay consistent and please the few people that do want to play an
actual non-human character /shrug