Humor is richly rewarding to the person who employs it. It has some value in gaining and holding attention, but it has no persuasive value at all.
“I make a joke that I'm the Internet curmudgeon, but 'wary' is a good way to put it.”
“At times I've got a really big ego. But I'll tell you the best thing about me. I'm some guy's dad; I'm some little gal's dad. When I die, if they say I was Annie's husband and Zachary John and Anna Kate's father, boy, that's enough for me to be remembered by. That's more than enough.”