I do prefer Koyaanisqatsi to any movie that thinks it has a plot but really just has a bunch of surround sound and vibrant colors signifying nothing. Koyaanisqatsi is great for putting on a large flatscreen in the backround while you're playing a board game with friends.
My favorite movie of all time is City of God -- tons of plot, compelling characters, realistic situation, great music, a totally immersive experience. I consider it the greatest movie ever made in spite of the fact that you have to watch it with subtitles unless you speak Portuguese.
Film, as art, should not be forced into a box.
There's value to film with no plot at all. Consider Koyaanisqatsi.