The problem with bears and dogs, at least in my eyes, is that Frontier sort of stumbled over their own feet with the first few entries for each. We got two subspecies of brown bear for some reason, not to mention all the polar bear backlash. And unfortunately, with the most blatantly visually distinct bears out of the way, each new potential addition is bound to be seen by some as "another" black bear. We saw it for the sun bear, we'll see it if we get the spectacled or sloth or American black varieties. I think most people would just wanna check the boxes for white, black, brown, panda, call it a day.
For dogs, three of our first four were literally just subspecies of Canis lupus (and given how many times I've seen people say that our first three were wolves, it seems like the African wild dog didn't leave a very strong impression either), followed by the somewhat less-than-eye-catching dhole. If, entirely hypothetically of course, we ended up getting, say, a fennec fox in our next DLC pack, or far more hypothetically than that, a maned wolf at some point in the future, I think people would be singing a much different tune about dogs, at least for the time being. But we've got standard wolves, we're totally hypothetically getting a fox soon, then maybe the funny tall one, that "covers" dogs at the most basic level (I couldn't disagree more btw, I need more dogs).
But with cats? There's still gaping holes in the lineup. We're missing household names like leopards, lynxes, cougars, arguably even ocelots. Those people you see discussing sloth bear vs spectacled bear, or most canids besides the fennec and maned wolf? Cats aren't even remotely at that level yet. If there's "too many" of them, then it's simply because there's that many iconic and well known cat species compared to bears and dogs.