I don't think Edwina has any problem that Mel thinks that way, I just don't think Edwina believes it's true. I'm not sure Mel does either, but it's become sort of a mantra.
Now I'm no human behaviour specialist... but Mel is so serious and touchy about being not being picked first for the netball team, erm I mean over not being considered the best at being all things to all people, that it may have been a total wind up from Edwina.