That's a pretty weak excuse for a rebuttal.
I know who Bruce is. I also know someone named Alan King. Who was insipired by Danny Thomas.
Which isn't really important - no one has to like Leary, or anyone else...but just because one doesn't like something someone may have done years ago, doesn't make 'em 'talentless', or brainless, or not worth liking, in everything they do all their lives.
But whatever. Maybe you're a see things in black & white kind of person, or similar, and that's cool.