It's really not that anyone prefers an abstract dot on a white canvas over the Sistine Chapel. It helps to think of art as a historical dialogue with other art, as well as an exploration of how our senses experience the world. Minimalist abstract art (Ad Reinhardt is one of the more famous practitioners) was pushing viewers to pay attentions to subtleties and small differences in our perceptions of color and shapes. That type of art isn't even fashionable or popular anymore (though many works from the 60s-80s are still revered, exhibited and expensive because of how they contributed to the art canon), in part because, as you can imagine after a while it was no longer fresh and new and making people think differently about art. What's hip now is video, multi-media sculpture and art that makes more of a comment on the state of world. Also a lot of art that uses new technologies. And a lot of irony.

Feel free to not like any of it, it is subjective, that's the point. You shouldn't let anyone tell you what art to like. Group think is bad in the art world as well (though it can be good for art dealers). But I thought it was worth the time to speak up against your characterization of the values of the art world. I have my own critiques of the art world but it's absolutely unfair to generalize that people see no difference between minimalist abstract art and the Sistine Chapel. And I believe it is interesting to understand why people consider particular works of art important even if that doesn't mean you should also subjectively like the piece.