One person's "disparagement" is another's valid criticism. You can see this come up constantly in lawsuits.

All I'm saying is it's a random site on the internet for a person who is a "Certified Bonafide Expert of Miscellanea"—no one is asking you to "trust the source material". If you think that aspects of the post bring into question the validity of the point being made, that's your right. I just think it's a weird expectation. The author even speaks to that: https://substack.com/@meghanboilard/note/c-102976235