My retort towards the " it would be legal if a human did it" argument is that if the model gets personhood then those companies are guilty of enslaving children.
> Compare that to pepople prompting directly with name of artist they want to replicate.
In that case, I would emphasize that the infringement is being done by the model, It's not illegal or infringing to ask for an unlicensed copyright infringing work. (Although it might become that way, if big corporations start lobbying for it.)