Fine guitar playing isn't necessarily improved by having people sing along with it. And the reverse is true as well.

If an accompoanying instrument helps a singer get a song across better, fine and good. But when people feel that somehow a song without an instrumental accomoaniment is necessarily incomplete, that's where I'd draw the line.

And why I'm going on really is because I'm only a few days out from Whitby, where the unaccompanied singing of such as Roisin White and Rosie Stewart demonstrated that whatever unaccompanied singing is, at its best it is in no way incomplete.