The short answer is copyright theft, energy consumption, and job displacement. While all those issues are 100% correct, there is also a huge unspoken factor of "you must be against it otherwise you are a brainwashed idiot" because, let's be honest, the hive mind is real.
Most of the modern no-AI luddites fail to understand that AI has been around for decades in various forms and this is just the last, most visible incarnation. It is here to stay, and it will grow as well. At this rate of adoption, in a few years it will be as normal as having a mobile phone (they weren't around only 20 years ago).
My humble prediction is that all the concerns around AI will be addressed with time by better hardware, better cooling mechanism, better energy production, different jobs that will leverage AI instead of competing with it, and surely also the copyright will find a new balance (just like MP3, Napster, and Spotify did not kill the music industry).
By the way, AI doesn't spy on you. An AI model is immutable once it's trained. The software using the model is spying on you, but that's true for any scumbag-driven software you use. It is essentially the same typing your secrets in Google Docs or in ChatGPT.
Can you make an example of something 100% original that was not inspired by anything that came before?