No offense taken. You are expressing an alternative point of view. I may not agree with it, but you expressed it in a reasonable way and that's fine.

What I did object to was someone who expressed a view similar to my own being called stupid (and shouted which made it worse) because that person in effect called me stupid as well and I resent that. She may not agree with the other person's point view but that is no excuse for calling them stupid.

That's why I came on a little stronger than I might otherwise have done.

That said, the few times I have performed for an audience I tried to look at the audience. Even when using dots (I am more likely to play than sing), I usually use them for confirmation and so glance at them from time to time rather than always read from them. I would not have dreamt of playing with my eyes closed.