"why do you think it so odd to suggest she wrote her own song?"

.,,.

The simple answer to that is that she is a singer, not a writer. A few people manage to be both: but there is nor earthly reason that the talents should go together in any particular individual; and indeed they rarely do.

So the suggestion that she should do so is, with all respect, IMO a little silly. Might as well suggest that Enrico Caruso should have written his own operas.

≈M≈