https://x.com/saralikeclara/status/1779593226120216885
This is an area known as epistemic trespass.
"Epistemic trespassers are experts who pass judgment on questions in fields where they lack expertise. What's wrong with epistemic trespassing? I identify several limitations with a seminal analysis to isolate three desiderata on an answer to this question and motivate my own answer. An answer (i) should explain what's wrong in the cases that motivate inquiry into epistemic trespassing, (ii) should explain what's wrong with epistemic trespassing even if trespassers do not acknowledge their trespassing, and (iii) these explanations should not be independent of the fact that epistemic trespassing involves expertise. I also independently motivate a fourth desideratum: (iv) this account should explain the evaluative difference between different kinds of trespassing. To satisfy these desiderata, I develop a social analysis: epistemic trespassing is wrong because it is an abuse of expert authority that neglects novice vulnerabilities."
https://pubmed.ncbi.nlm.nih.gov/34024942/
I strongly agree that novices and people who've not performed due diligence may be classed as epistemic trespassers. Ballantyne lays out interesting arguments.
Nathan Ballantyne, Epistemic Trespassing, Mind, Volume 128, Issue 510, April 2019, Pages 367–395, https://doi.org/10.1093/mind/fzx042
https://philpapers.org/archive/BALET-2.pdf (accessible version above paper)
I'll go further and say that the harms of epistemic trespass in some spheres is rarely limited to the individual as it can harm other people. Bystanders may be led into error when they trust epistemic trespassers for whatever reason seems acceptable (outsourced thinking, lots of social support for an idea). Genuine experts can deplete precious, limited resources refuting the popularised errors of epistemic trespassers or leave it to PR campaigns to correct those errors (which may have limited success, look what's happened here with Cass).
However, people like Stephanie Davies-Arai have expertise in adjacent areas and have carried out analyses of the evidence that have effectively been formally confirmed by York and Cass. This is very much in lane for some people who have relevant research skills and knowledge. There is space for acknowledged autodidacts whose accuracy is verified by others.
This by no means exculpates Muang or others but it would be wrong to deride anyone as a commenter because so much of healthcare can now be beyond niche in its narrowness.
NB: it's can be wholly correct to roll eyes at people complaining about the make-up of the authorial line for systematic reviews. As people have pointed out, clinicians have done their bit in obtaining funds, running the trials in mandated phases, and publishing their results. For a systematic review and/or meta-analysis, you need trial methodologists, statisticians, information retrieval specialists, data analysts etc. - a multi-disciplinary team of people with relevant skills and expertise that they leverage for the review.