I mostly agree, but they won't actually ever get rid of any of those divisions. As long as there are enough fighters to legitimately field female divisions and men's 125, the UFC will do it, bc if they don't, a competitor will. Before anyone laughs at that, Ronda wasn't in the UFC when she blew up, she still fought for Strikeforce, and was one of the main reasons Strikeforce blew up, and probably one of the reasons Zuffa bought Strikeforce (not bc Dana was interested in using her, bc he wasn't at the time, but bc if he owned Strikeforce they can no longer gain momentum that doesn't directly benefit the UFC).
The UFC, they could fill a women's 145 division with women legitimately found outside on the sidewalk and fans would still believe their division is better than a competitor's, even if it isn't. Just the existence of those divisions prevents a competitor from finding an angle that is perceived as something fresh, relative to the UFC, helps prevent potential for competitors to actually compete. If the UFC is the one keeping all of the standards, it makes it difficult for anyone else to find a fresh new angle that might get people interested. I think we need to get used to the idea that the only changes on the horizon for weight classes is probably more of them.