I wonder where this expectation comes from? Is it because of high quality free as adware/spyware commercial software? Or the way development centered around rep

I wonder where this expectation comes from? Is it because of high quality free as adware/spyware commercial software? Or the way development centered around repository name and we do not use forks? I treat open source as a gift. It allows modifications, it allows forks, what's wrong with people?