That may not seem like it matters to you, but some people don't want to read things that involve beings other than humanoids :) I think that's the reason it's separated, although that's just a guess.
I'm one of those.
It's a fact that these boards are more heavily-leaning. That's always been true, and it won't change. Yes, there are more non-consensual boards, but if they reflect how the boards really weigh, then is it necessarily a bad thing?
Personally, if NC isn't my thing, I just click that little minus mark next to where it says Play-By-Post: Non-Consensual Exotic and collapse the whole board so I don't even have to look at it. *shrugs* It might seem a bit mocking, but if this new member feels a little uncomfortable seeing
how many NC boards there are, maybe let them know that they can collapse boards so they don't have to see them - it might at least subconsciously help them be more at ease.
I really appreciate the separation between Exotic and Human, but that is only my take.