Is the majority of the Haredi public very much against the concept of "accepting the truth from whoever told it"?

I have often encountered the perception among the ultra-Orthodox public that they are not at all open to critical thinking about issues that are not necessarily related to Torah and faith, and yet they were not willing to listen.
Is the Maimonides' approach of "accepting the truth from the one who said it" really said this about every topic? Because from what I understand, Maimonides says that if I look at a particular article, I should not look at who wrote it, but at what it says. And the Haredi community generally feels that if there is a particular book but there is no consensus on it, it simply does not count. Is there any explanation for this phenomenon?