Perhaps you haven't had as much moderator interaction as I have, but this is not the case whatsoever. Some subs will have 30 mods and each will apply the rules differently.

Point being, comparing HN to Reddit is a category error; HN is in the same class as subreddits. This is less about HN and more about Reddit itself: Reddit is not a community, it's a network of communities on a common platform. Each subreddit is its own reality.

I don't know if dang is the only HN moderator, but even if he's not I've never seen any evidence of anyone in that role here just capriciously remove or lock discussions in a way that's absolutely commonplace on Reddit.

There are subs on Reddit that I simply no longer engage with because I'm sick of dimwit edgelord mods locking discussions whilst I'm typing out a contribution even though there's nothing wrong with either the original post or the discussion. There's no sense of consistency in the way the sub rules are applied in each of those subs.

A few weeks ago on the CasualUK subreddit one of the mods went off the deep end and started hurling insults left, right, and centre, and banning people simply for politely calling out their poor behaviour. That mod's conduct absolutely violated the rules of both the sub and Reddit as a whole. It's not OK and, again, it wouldn't happen here.