Unless they agreed to provide their work for that purpose for free.
Postulate #1: Image generation models would not exist without large amounts of training data from current artists.
Postulate #2: Every major AI company either trained directly on public web scraped datasets or is murky about what they train on.
Theft at scale does not somehow make it not theft. Stealing 1/100th of a penny 10 billion times is still stealing.
And when you repackage the results of that theft in a profit generating machine, and then label it not theft because "it's a whole new thing," you start to sound like a CDO apologist.
And look, I get it -- it's about money.
It's always about money.
You may not be making any off your work, but that's immaterial because lots of huge companies are making obscene amounts of money from doing this (or expect to be in the future).
At the same time, it is an excellent tool. Art without human time! It will eliminate a lot of artist jobs, but everyone as a whole will be better off (because we're swapping human labor for electricity).
However, the currently vogue "artists don't deserve anything" smacks more of "we don't want to share profits during the transition period" than a cohesive moral argument.
We can have an AI future, but we should be honest about what enabled that. And we should compensate those people during the transition.
Hell, AI tax. Paid to everyone who created a work in a scraped dataset. Sunset in 30 years. Done.