Earlier quoted context omitted.
That's not the ratio of men to women in the tech industry, and said ratio is not caused by competency discrepancies. It's actually partially caused by exactly this kind of sexist drivel that you're spouting; who would want to enter an industry that is so unwelcoming? Why is there so much sexist trash in the HN comments today?
Just because you disagree with an opinion does not make it sexism. If anything it exaggerates your own self prescribed ignorance.
Indeed, the person that responded to you could have been less inflammatory, but it is pretty hard to keep it cool when you are surrounded by people that dismiss an entire group of people based on gender, sexual orientation or skin color.