Of course they've got an ego. Everyone should have, the definition of schizophrenia is someone whose ego periodically shatters and disappears.

Ego is just sense of self.
How can you have anything to express about your life if you have no sense of self. no sense of who you are.

Even if you sing exclusively traditional songs - surely they should be about your emotions. Not just a recital of words.

Its the difference between a performer and a speak your weight machine, or the lady in the satnav.