Actually I think that's a pretty good point. In any airplane you push forward and the trees get bigger, and you pull back and they get smaller. It's the decision making skills that are lacking with low time pilots. With VERY low time pilots there's a deficit of both stick/rudder and decision making skills. You don't know what you don't know until you get more experience...If you can realize that fact, then you should be able to figure out when it's time to advance. For most people, 500 hours is not that time. There will always be exceptions to the rule...