As an aside, most of the mods are toward the "soft" side of science (biology, medicine, social science), and likely do not understand statistics very well. Papers with glaring issues regularly make it to the top because their conclusions are cool, not because they are truly good/impactful works.
It is probably less being a moron or incompetent than having an agenda would be the likely complaint ... depending on the subject matter that is. I suspect this is much more of a problem is social sciences than, say, pure mathematics.
It’s saying that criticism must “assume competence” - that’s very different - and as a moderator I can twist any kind of criticism into a violation of this rule. And why do I have to assume competence anyway - shouldn’t the work stand on its own merits?
And let’s get something straight - “being a moron” is not equivalent to being incompetent (in an area of expertise). One is just name calling the other is a specific legitimate criticism.
When disagreeing, please reply to the argument instead of calling names. "That is idiotic; 1 + 1 is 2, not 3" can be shortened to "1 + 1 is 2, not 3."
That these rules are not enforced by deleting content but the comments largely disappearing from view (based on community voting) is not a hugely different outcome IMO. It’s also worth noting that you don’t have to participate in such a community if you don’t want to. Their space and their rules.
> Criticism of published work should assume basic competence
That rule for example would bar a commenter from critiquing the work for not taking into account a confounding factor, or for using a non-representative WEIRD [0] population sample to reach overly broad conclusions. Taking these issues into account can be argued to be "basic competence", but they are too often ignored in many the most headline-worthy social science papers that attract the most upvotes.
[0] western, educated, industrialized, rich and democratic : https://en.m.wikipedia.org/wiki/Transnational_psychology#WEI...
Also, you shouldn't need credentials to demonstrate that you know something - the fact that you post something polite and useful should be enough to have your comment not be removed. It is a useful proxy for moderation at scale, though.
The moderators of the subreddit obviously disagree. From the sides I would say it works for them.