For an arbitrary definition of "normal"? The last remark is unwarranted and can only have a chilling effect on the conversation. Or outrage bait, a typical sign on social media.
Why is it not social media? It exhibits the same signs as seen on any social media platform. Can you define social media so we can all follow the same play sheet?
I see the same opinions here as I see on Reddit, Facebook, LinkedIn, or X even from the same people here as there. The topics that reach the front page are the most popular, or divisive, or "addictive". A lot of people post for the karma, there's a lot of pandering to popular opinion. There's an opaque algorithm that decides which topic stays on the front page and for how long, which comment stays on top and for how long, when a post or comment gets flagged or reappears, etc. that dictates how the conversation can be carried and on which topics. There are a lot of political topics where some voices or opinions are buried while others are pinned to the top. Some people spend hours and days posting here. There's a lot of astroturfing. The parallels can go on. The main difference is scale and at this small scale it can maintain a higher level of quality... most times. But quality isn't what defines social media, is it?
Many on HN see themselves as better than the "simpletons" who fall for "normal" social media, and any view that challenges that is tiresome. But your dismissal of whether HN is social media holds water like a sieve.