Representative take:
If you ask Stable Diffusion for a picture of a cat it always seems to produce images of healthy looking domestic cats. For the prompt “cat” to be unbiased Stable Diffusion would need to occasionally generate images of dead white tigers since this would also fit under the label of “cat”.
These guys.
Over on Mastodon I linked to an NPR article where they kept asking Midjourney to generate images of BLACK doctors treating WHITE children in Africa and it was largely unable to do so, even with the prompts. Not “no problem,” but Midjourney sometimes literally interspersed Giraffes and Elephants into images with Black doctors.