I don't think this is entirely right (not a lawyer)

You can't hire an artist to draw black widow in the style of Scarlett Johansson's widow. The issue isn't how the art is made, it's whether the end result looks like her.

I think there may be additional issues (to be determined either in courts or by Congress, in the US) with regard to how Dalle makes art, but elsewhere in the thread someone mentioned the Ford Bette middler case, and that does seem to be relevant (also, though, not exactly what happened here)

I don't have the expertise to know how similar this is to the case at hand.