You're talking as if there is a way to get an 'unbiased' AI. There isn't. It is inherently biased by its training, it hallucinates, and it is further biased by its prompt.
The whole endeavor is to bias it.
I'd prefer that AI be labelled on the tin for what it's biases are attempting to do, and promote diversity and deter abuse seems like a perfectly reasonable metric to use.
If that's not good for you fine, but you can't pretend that you're utterly baffled why they would make that choice over any other.
There literally ISN'T a way to not have a biasing prompt.