It's a perfectly sensible interpretation of international copyright law.
I'm not sure if you're serious with the suggestion I could sue them. These are both US corporations, that justice system is pretty much in shambles in particular when it concerns corporations as big as these AI ones. You can dig your heels in the sand to defend that system, but you will also have to dig your head in the sand about why Sam Altman doesn't have a Disney "influenced" avatar, but one "inspired by" Studio Gibli.
And I'm not sure if you're familiar with the concept of "fair use" in the US as it "works" in practice, it's almost insulting, ask any music education youtuber.
Also even if it would work (which it very much doesn't), whether it "hurts the original publisher" is actually literally one of the criteria for considering something fair use or not. Look it up.