I've done this debate before many times .
If you choose to work for your boss, obviously he needs you. There's nothing wrong with that. You both made an agreement, so nobody should be complaining unless someone actually breaks the agreement. For example if your boss starts underpaying you.
As for "you don't need your boss", well, if you really dislike your boss, the wonders of Capitalism allow you to actually make your own business and sell your own products, if you really want to do that.