Except you're conflating a person thinks with what they do. It is still entirely possible for your hypothetical coworker to give a more honest evaluation of a female colleague's tech work than for one who was a women's rights firebrand and perhaps prone to overlook poor female performance because of his or her own biases. You are right to demand impartiality where judgment affects another person's equality. It's unfair however to assume without evidence that someone is incapable of impartiality because of what they think.