If modernist naturalism were true there would be no objective truth outside of science. In that case right and wrong would be a matter of cultural preference or political power and the power already available to modernists ideologies would be overwhelming.
Great art speaks a language which every intelligent person can understand. The people who call themselves modernists today speak a different language.
I'm often called an old-fashioned modernist. But the modernists had the absurd idea that architecture could heal the world. That's impossible. And today nobody expects architects to have these grand visions any more.