Firstly, everyone has an opinion.
Secondly, everyone needs to make a living.
That brings us the uncomfortable bedfellows known as art and commerce.
Part of the art side consists of artists, schools, teachers and of course serious bullshitters and failed artists.
Part of the commerce side consists of agents, galleries, salespeople, media writers and of course serious bullshitters and failed artists.
Put them all together and you've got the clusterfuck that is ART.