The Professor-Postdoc Relationship in Research Supervision
Based on comments, I'm going to guess that "yes" he is exaggerating but also that, based on his experience you should consider his advice. 

But that doesn't imply that you need to take all of the advice, any more than you need to take any particular bit of advice from a formal reviewer after paper submission. 

I'll also guess that his intentions are good, even if he is a bit overwhelming, and that you should just try to make it work between you. You won't be in this position forever and will want his good will when it is time to move on. 

I think that the opposite would be worse - no real comments. 

Resist if you think he is wrong, of course. But think long term about your career. Learn what you can from him and then go your own way.