Enabling mass-production of Ghibli style without permission or monetary compensation is theft.
It's promotion for OpenAI's product, without any of the appropriate licensing. 3D printing companies don't provide Lego schematics to sell their products. There's also the small matter of their ex-employee turned copyright whistleblower, who ended up dead:
Japanese artists exist.
Would the world be better off if Picasso's heirs owned Cubism and any artist wanting to produce works in that style had to buy a license?
“When we opened the new studio, Studio Ponoc, I went to report this to Mr. Miyazaki,” he went on, “and he gave his blessing and said, ‘You really need to have the conviction to go create a new film studio and the conviction to show children worthwhile films. And every film you make, you’ll have to realize that has to be a film that is worthy to show to children’.[1]