Jim Morrison was a drunken buffoon. Manzarek was the brains behind the Doors. Both mentioned were vocalists.
Okay so you don't respect him? The point is, neither of these dudes I mentioned played instruments and still got respect. I don't think a rapper particularly needs to be able to play an instrument to be respected, especially if they're a skilled rapper because that is a talent in itself, just like being a "vocalist" is enough of a talent.

