But then there’s that whole exchange from World Enough and Time that ends with this:

DOCTOR: Please, listen to me. Look at me. Go on, look at me. That’s good. That’s very, very good. Now, do you see this mad woman sitting in this chair? Her name isn’t Doctor Who. My name is Doctor Who.

NARDOLE: It isn’t, is it?

DOCTOR: I like it.

I know they’re doing a bit, but I think it provides adequate cover for proper geeks to nevertheless use the expression when it’ll provide shorthand clarity.