HN hasn’t been turning into Reddit for a long while because sometimes the moderators make comments like this and the community goes “Okay” because they value the community and can see the moderator’s point and those matter more than typing something easy to type because it is all over Twitter.
More seriously, if HN’s moderation conflicts with your deeply held principles, HN might not be for you. Like any social media that makes someone unhappy, a voluntary break, temporary or complete, may be warranted.
HN is not going to suddenly become a democracy or collective. Moderation is a big part of what makes HN HN.
There are benefits to "RTFM". They may involve making sure there are shared assumptions during speech that allow further speech to be economized equitably between speaker and receiver. They may involve the internalization of the structure of a model so that they it be applied fluently in some practical setting. Your suggestion fails to satisfy either condition as the cost is either inequitable, or the benefit is irrelevant.
Putting a tag that says "moderator" next to a username is such a cheap quality of life improvement that even if what you claim is true, it really shouldn't be the job of the audience to figure anything out in the first place, as by comparison, it looks like a strong disfavor.
Words to avoid living by.
I don't see this as RTFM; there's no FM to begin with, other than perhaps https://news.ycombinator.com/newsguidelines.html and https://news.ycombinator.com/newsfaq.html.
What are those 'downsides....quite strong downsides actually'?
Assumes there are no new readers on HN and that everyone reads almost everything and nothing needs repeating. Also it's very 'no noobies' as if anyone who is anyone should know the ropes already. And that is not the case.
And I've mentioned this before a few times so I will repeat. Why don't you have in your profile that you are a moderator? How would someone new to HN know why you are saying what you are saying and why you have the right to pin what you say at the top?