Your relay your choice. On a centralized platform you have no choice and the lack of choice is the problem with their censorship.

I run your relay. You still have no control over my feed. I could also run my own or any of 100 others. I do run others in addition to yours.

Put another way, censorship is fine. What is bad is the lack of self sovereignty when others completely control what is censored for you against your will or without your knowledge.