Thank goodness, I do like Perry Como as well as many other performing artists.
Welcome to all the new AW members. When you correspond with your fellow PAers who don't visit here, don't tell them flat out that they're wrong. Just let them know that you actually got to discuss publishing and writing with real professionals whose books are in stores coast-to-coast. Tell them in private emails that PA can't view. No sense in needlessly getting yourself banned. Then let them know they can join free and learn almost all they want to about the industry and writing.
You don't have to tell them that PA is lying because PA wants to isolate all those writers so they'll purchase their own books. They can learn that as they go along absorbing all that other knowledge that they truly do need if they want to be successful writers. Eventually, they'll come to the realization you have already. Even if they don't, at least they'll learn what works in self-promotion and what doesn't. Think of it as a gift from you to them that won't cost you or them a cent, but will enrich both your lives for many years.