yea nonconsensually sexualizing or fetishizing someone is bad. but also there are people out there who fetishize their own marginalization. they and their sex partner(s) should be allowed to have whatever consensual sex they want. like. you don't have to like it. you can hate the idea of it with every fiber of your being.
but other people engaging in consensual sex are not the problem. you are not involved in other people's sex life. the actual problem here is that some people are marginalized to the point intense attraction to them is deemed unnatural and "other."