It is more complicated than that. Ellis has admitted to having a crush on Kitty growing up, and Wisdom was much, much older than Kitty AND Piotr (he was supposed to be at least in his mid 30s). That relationship was already kind of icky to begin with, but now with the all new scrutiny that it would get with these allegations, it takes on a whole new level of problematic. Yes Piotr was older than Kitty, but he was still a teenager himself and much more naive than Kitty (and even then that relationship would not fly today), Wisdom on the other hand was both much older and experienced than Kate, and sincerely it evokes images of grooming, and considering Ellis situation right now, is not something that Marvel will want to be associated with. As I already said, this might even mean the end of Wisdom as a viable character, who himself was only used because he was an Ellis creation.