If Rose is your BFF and she's superior to the the rest of the universe but the doctor is your arch enemy that you believe deserves to die, than why do you ship them together? Have you just accepted that Rose loves him and come to adore their relationship? Or is it just too complicated for us humans to understand?
I hate the Doctor but I love Rose and Rose loves the Doctor so I tolerate the Doctor. That’s about it. If being with the Doctor is what makes Rose happy then I have to support that. I’d still totally love to exterminate the Doctor though. That idiot doesn’t deserve Rose.