The reason is this. I think greats deserve some respect. If someone wrote Federer couldn't play tennis twenty years from year I would defend Federer. It may be opinion but I think past greats deserve respect. Now you can be upset at me for that but I think Federer, Laver, Nadal, Rosewall and guys like that earned it. Now you can say I'm wrong in this opinion but that's how I feel. Now if someone wrote that Federer would defeat Laver easily I can understand that more than someone writing that Laver played Grandpa type tennis. The term grandpa is not exactly one of respect in this case my friend.