I wonder what Johnny Carson would say about the demise of late-night television. Carson was genuine and funny — at his funniest when his monologues bombed. On Bill Maher’s podcast, Jay Leno explained why he was so much better than today’s late-night comics: “Carson had class. He was gracious. You never saw him angry. He never talked down to the audience. He was never mean — and that’s a form of…