I'd be interested to hear more about this - but in the past its certainly true that indigenous myths were seen as useless to science. There are several examples of natural events and disasters being correlated with myths retold in indigenous oral histories.

You're right to point to Mr. Peterson regarding these postmodernism complaints. A succinct summary is that he claims in a movement called "postmodern neo-marxism". Marxism is a modernism movement, the phrase itself is already a contradiction. And yeah, almost no activists even know about postmodernism.