It's funny to see a super privileged white male like Jerry Seinfeld dismiss concerns about representation and diversity because it's pretty clear he's never once thought about who gets opportunities to showcase their talents and who doesn't.
He said things like gender, race etc aren't factors in who he has on his show, because race/gender have nothing to do with how funny a comedian is. And he's right. He's had women and black people on his show. One can assume it's because he thinks Dave Chappelle and Ellen Degeneres etc are funny. This is how a person who isn't racist or sexist thinks.