I'm pretty fine with it?
That was the god domain they chose. They're specifically about nature and things that inhabit nature. People and races close to that are always held up a level above "just nature." This makes it so there really isn't a conflict between "a race chosen by a specific god" and other things. The issue becomes where you want to claim a bunch of other races and beasts on top of that, I feel. I thought Werewolves and Moon was cool, so I talked to nature god, and bam, werewolves.
More importantly, it causes some interactions with the god. It stops things from being super insular. If any god can make up any race or beast they want, what is the point of having that niche? We all chose things we thought could be cool and fun to work around, and I had fun negotiating with others and seeing what deals can be made around that. I would be pretty annoyed if, idk, Law Goddess was trying to dictate the future or fate for their people. No, that is what I specifically chose to play with, and if you want something like that, you have to interact and make a deal with me. That is the fun of RPs like that to me.
Anyway, just my 2 cents. I don't think Yukitamas was planning on literally every race, rather, things beyond the one or two chosen races by their god. Otherwise, you can just side step and mundane his niche, making the entire point of choosing our powers kind of moot?