If he is a 6 handicap he has a long way to go unless he wants to be a club pro.
However, you need to consider the kind of pro he is trying to become. Granted the dream of domination, or even just a fair number of wins is nice. There are also some less ambitious who are happy just to be able to wear the uniform and be a part of a very small group. Those guys are happy just to be able to squeeze a living out of the role. They take up space and are happy to be good enough to take up space. They count outscoring a name player as a win.