We've always known medical treatment is biased. It isn't evilly deliberate, but is obvious, known and ignored.
Pretty much all medication and treatments are designed for and tested on, predominantly on white males.
Women are too complicated to use in trials, not sure about non-white people, not enough volunteers, not enough effort? Obviously pregnant women, children, and severely ill people aren't used...
It's been only relatively recently, considering how common they are, that doctors are starting to use antidepressants differently for females, as they work differently for them.
Bias doesn't mean deliberate. It isn't intentional.