HN is actually one of the more AI-positive sites around. Some people just generally hate or fear AI because it's called AI and that comes with 100 years of scifi fearmongering baggage and modern fashionable doomerism. A lot of people hate AI because it enables behavior that they don't like: spam, slop, and other low effort content that drains energy and attention but provides no value. Others dislike being pushed to introduce AI into their workflow and tokenmaxxing policies. A few fear job loss or may be unable to find employment in their desired field due to AI tools. I've personally never used AI at all (because it didnt interest me) but have been growing interested due to HN articles and comments extolling it's virtues.