AI taking the job of someone else by stealing art aside,
According to Shutterstock’s contributor rules, AI-generated content is not permitted to be licensed on the platform unless it’s created using Shutterstock’s own AI-image generator tool.
The picture was not flagged as AI, so it was sold as real art against their TOS.
I don't think the artists or even the studio did this maliciously, but there needs to be discussion on how stock art should be vetted when used like this