Why, according to you are they worth and not worth examining?
So yeah. Credentials do matter, and it matters that this person is not willing to say this out loud, in public, without using a pseudonym.
Reputable journals and other publication outlets use something called "Double Blind peer review" precisely to prevent that the reputation of a researcher could skew the peer review process.
If you want to review and cast a judgement for the points presented in the article, you should do it only by refuting or confirming the content of the text itself. Not because it was written by Einstein or Donald Trump.
Double blind peer review is INCREDIBLY UNCOMMON among high impact biomedical journals
Anyway the blinding, when it exists, is as much to protect the reviewers from retribution by asshole authors, as it is to avoid biasing the reviewers by the reputation of the authors.
Second, you're missing the key difference, here: peer review is for review and evaluation within the community of qualified scientists.
What I'm talking about is something else: the ability of the reasonably well-informed public to evaluate claims, even though they lack domain expertise.
(Musing: What is the probability that a genetics expert's opinion on the probabilities at play would make the discussion less well-informed rather than more well-informed?)
The problem is that we've come so far that him not saying this out loud is not necessarily hinting to him being a charlatan. Plausibly, the cost/benefit analysis by that individum might not make it worth speaking the truth given how heated up the matter is rn. If this sentiment propagates to other topics I fear that larger (and important) parts of the world might drift towards soviet era incompetence