Why AI art is so controversial

It takes art with (usually) no consent and trains itself. Also, an ai cannot technically learn anything. It just does what it is commanded to do. If someone gave you a chinese-english translation book, and told you to communicate with a person in an another room who only speaks Chinese. Also you can only communicate by writing on a paper. You look at the book for answers and write a reply. The person in the other room will think that you speak Chinese, when in fact, you don't know any Chinese. You just used the book to translate and write a reply. I really don't know if this makes sense. I saw this on shorts and I forgot half of what he said and yeah💀