No I know they are not. I just don't think there are many, maybe only a handful of great players who became great manager. Johan Cruyff is the only one I can think of. Zidane: great player, good manager but not great.
He is not exactly in the same frame as Cryuff or Wenger or even Pep who all changed the game as well.
I would even put "the special one" above him as he won things under many circumstances in many places.