Later in the phone call, when Kanye tells Taylor about that part of the line, he says: "What if later in the song, I was also to have said, 'I made her famous'?"
To which she replies: "Oh my god. Well, what am I going to do about it? It's just kinda like, whatever, at this point. But I mean, you’ve got to tell the story the way that it happened to you and the way that you’ve experienced it. Like, you honestly didn’t know who I was before that."