Comment by rifty

I think baseline it should be tuned to be statistically accurate. The problem is that people leave a lot in their prompt to be implied. Some interaction designers use this as an opportunity to infill their own subjective opinion of what should be inferred as a way to 'take care' of the user.

This isn't their only option... they could also just ask for more information.

A good approach here would be ask the user to further clarify what exactly they want before generating a person — "Do you want a random depiction or a specific depiction". A good tool for users is one which helps them be and feel more tactically or predictably in control of it; which means making them aware of its behavioural pitfalls so they can avoid them if they want to.