The Artstation website always have been about artists displaying their own craft to the community. But an artist can not show their craft if there is no craft to be displayed, or even any art being made at all.
AIs are products that were made using stolen art, and that alone should be a reason to stop this widespread of images generated by them.
We need Artstation to make a stand against AI with an official policy. I'll keep posting this image until they do.
If you like, post the same image and see if we can get Artstation to actually hear us.