The whole point of modern psychology’s imperative to have a positive self image is to oppress.  If you are a peon and you think of yourself as a peon you are more likely to push back against those oppressing you (by collective bargaining perhaps).  However, if you think of yourself as this amazing person while still being a peon you are more likely to put up with whatever comes your way.  This isn’t always true obviously, peons with amazing self image may fight back against their oppressors but as a general rule it holds.