Here Wayne,,,,common sense at its easiest. Try to follow along.
Greatest Hits albums are the best or most popular songs (as regarded by the majority or public) and therefore, most of the public buy these albums because,,,,,,,,,,,,are you ready Wayne,,,,,,,,,,theres usually NO bad songs on them.
So my question to you would be,,,,,,why wouldnt a Greatest Hits album be considered better than the solo albums since its a combination of the best songs from the solo albums?
Hope thats not too confusing to you. I'll be waiting for your intellectual response.