What makes art good?

I would have thought being able to draw would be the starting point for any artist. Though I suppose, if you want an accurate picture, you could just take a photo.
That brings up the question - what should artists be doing?
Let's have a look at some pictures:

I suppose this one could be an abstract impression of a pair of breasts, or a pair of eyes.

This one could be titled "Deformity at Birth". Maybe he just needed to put more effort into getting the eyes lined up?

I think this guy just got a little confused about what is painting and what is writing a book. Perhaps he just needed someone to say,
"No Colin, draw pictures. Words go in books,"?

Maybe some of these artists started painting before taking a few lessons? Perhaps someone should have taken them to an art gallery first, so that they would have known what they were supposed to be doing?
It all comes back to education. Bloody wishy-washy teachers! Don't get me started.