If you're deciding between two similar candidates, the choice is pretty arbitrary anyway. As a white man, I've never been discouraged from pursuing my career in tech. A woman who is similarly qualified than I am probably overcame more and worked harder to get there than I did, so it's a reasonable tie breaker even if you don't value diversity for its own sake.

Even with these tie breakers, most large tech companies have about 10% women in engineering, so this discrimination isn't affecting the men that much. Are the companies you're thinking of different in this regard?