Exactly. Everything is subjective. I am only an admirer, I'm not an artist, but speaking to curators, I know quite a lot and it's impossible to draw lines. We all have out opinions and see things in a different way. They say beauty is in the eye of the beholder and not without a reason. It's a very volatile world.
Look at the most famous paintings for example. A good part of them are ugly, yet those are the most expensive ones.