If you run someone's artwork through a filter is it completely fine and new just because the output is not exactly like the input and it deletes the input after it's done processing?
There is a discussion to be made, in good faith, of where the line lies, what ought to be the rights of the audience and what ought to be the rights of the artists, and what ought to be the rights of platforms, and what ought to be the limits of AI. To be fair, that's a difficult situation to determine, because in many aspects copyright is already too overbearing. Legally, many pieces of fan art and even memes are copyright infringement. But on the flipside automating art away is too far to the other side. The reason why Copyright even exists, at least ideally, is so that the rights and livelihood of artists is protected and they are incentivized to continue creating.
Lets not pretend that is just analysis for the sake of academic understanding, there is a large amount of people who are feeding artists' works into AI with the express purpose of getting artworks in their style without compensating them, something many artists made clear they are not okay with. While they can't tell people not to practice styles like theirs, they can definitely tell people not to use their works in ways they do not allow.