I know 1000 hour ex- integrated cadets who trainers say have better flying skill, situational awareness, decision making and CRM than most captains do.
I have also seen enough command assessments to know that the brilliant cadet that seemingly can do no wrong will often fall to pieces when put in the hot seat without a captains support. They know everything they need to do and yet they are unable to prioritise and organise themselves to get it done in an orderly, safe and expeditious fashion.
If nothing else at the very least every six months you are in the sim learning new failures, watching new guys deal with problems, leaking your wounds if you get it wrong... therefore every six months you have a few more hours and you are a little better.
Pilots are for the most part made not born. They are made by instruction, study, practice, imitation and exposure. Some people will never make good pilots regardless of hours but that does not in any way mean that most pilots will not improve with experience. If you think that you are so good already that experience cannot teach you anything you are heading for a hard lesson.