you're reading way too much into this. what it says is that it targets ads. if the ads didn't work, they would use others. that's what the metrics are for. yes, humans introduce bias, and it could affect the actions to some extent and introduce the bias and become self fulfilling, but only to a limited degree. enjoy the day.

edit: one of the assumptions they started with was that sex sells. to men. the tweaking part is now that young women sell things to old white men. other groups may have different influences.