AI isn't "like a person" it doesn't "learn like a person" it doesn't "think like a person" it's nothing like a person. It's a a machine that creates copies of whatever you put into it. It's a machine that a real person, or group of people, own. These people TAKE all the stuff everyone else created and put it into their copy machine.
In fact it's really easy to show that it's a copy machine because the less stuff you put into it the more of a direct copy you get out of it. If you put only one song, or one artist, into it then virtually everything it creates would be direct copyright infringements. If you put all of the worlds music into it the copying becomes more blurred, more complex, more interesting, and therefore more valuable.
Sure AI is a great innovation, but if someone wants to put my work into a copying machine they're going to have to acquire it from me legally.
No one is against AI, we're just against the people who own the AI machines stealing our work without paying for it.