The only product of AI is labor displacement and, by extension, wage suppression (as the duties of the displaced become free labor from those who remain and those who remain aren't asking for raises).
So ahy are so many on HN anti-AI? Because automation has finally come for them. Now it's personal. While it wasn't personal, you could pretend that people who had their livelihood taken away was a result of personal moral failure. You would see that 10 or 20 years ago when people would quite callously say "you should've done computer science" and that was that.
There are a lot of reasons to hate AI, not least of which is the externalities. It's essentially profiting off intellectual property as well as user-generated content for no compensation. Software people can actually identify with that in a way they just didn't when it was music, art or literature.
The data centers themselves nobody wants. They get massive tax and electricity breaks. Everyone pays for the upgrades and gets to live with the water pollution ,noise and higher utility bills. And because the data center is powering labor displacement, unlike, say, an auto plant, it produces negative jobs.
This all comes at a time when society is at the breaking point. Unaffordability is a massive problem (only getting worse) while we rapidly approaching minting our first trillionaire. Wealth inequality is reaching levels that historically have resulted in violent revolution.
AI in particular and automation in general could be a good thing for society. In another version of society it would allow people overall to work less and more menial jobs could be automated away. We don't live in that society. We live in the society that will make 99% of people poor so a handful of people can have $500 billion instead of $400 billion. All while the world seems to be getting ever more violent and cruel and major issues like climate change are going to start biting real hard.