I suspect the colloquial use of "modern art" in this thread is perhaps better described as some unholy conglomeration of abstract expressionism and minimalism. Think Pollock, Rothko, Mondrian and Malevich. (Yes, I know they seem quite distinct to you, but the common link for most people is "my five-year-old could do that.")

And I can't speak for others, obviously, but I actually quite like modern art. Sculpture and architecture more than paintings or music, though.