I don't understand how a person who really sucks deludes himself into thinking he can sing.
Jack, I was singer but I lost my singing voice, so now I don't even try. I can do a good impression of Mr. Creosote, but that's it. Not a big audience for that.
Someone remarked about ex champion, Joe Frasier, "Who ever told him he could sing"?
Answer, "Who's going to tell him he can't"?