Why is Doyle Brunson considered to be so good?

[Shootmeplease]

He won 2 Main Events and has around 10 bracelets but there was only about 10 people back then. In the main event he just calls every bet when he is dominated. I think the new generation of poker players is going to dominate his passive playing style. He is just way too passive to keep up with aggression of the newer players. I am watching the main event now and it is sad to watch, he is nothing but a calling station. He may be the most over-rated player ever!