I asked earlier, can people enjoy and experience their songs while reading them or worrying about remembering them. I never received a reply, so I took the answer to be no

You never got a reply because most of us have given up trying to persuade you. You've taken a position of patronizing arrogance that no experience and no facts could shift. When you implicitly accuse people like me of lying because we have contrary experience, we aren't likely to bother arguing the point with you again. We'll just let you rot in your own fantasy world.

It's massively destructive to insist that everybody has to meet the standards you want to impose before ever opening their to sing in the presence of another human being. You probably believe mothers should have a City & Guilds certificate in balladry before singing a lullaby to their babies. If you're insisting that nobody with lower performance skills than Walter Pardon should ever be allowed to sing (and your postings are loaded with moralistic language about "allowed" and "excused") you are helping consign the corpus of traditional song to oblivion.