Strongly different of what you think there are a lot of PhD in the area that agree with him. That people have different biological systems and so the expressed skills are different. The same way genes express the gender they also express different skills. What I don't understand is why this is so bad? we have different skills, let's try not to think everybody is exactly the same and focus in the skills every individual have.
It's the idea that it would be unfair that on average women cannot do as well in things men do, ignoring basic biology that genders are different and that there are things that absolutely no man can do, that women can. Even sometimes those areas which privilege females are seen as they were basically cornered into doing, and have no bearing into the fact that while there is some chauvinism, that possibly on average the desires, needs and skills may be not better or worse but different. And the women that embrace those things are positive are seen as being dominated against their will, or brainwashed into hating themselves.
In short, if a women does something that historically men used to do, then it's good. Else, and even more if it is something that historically women used to do, they are being subject to sexism.
The PhD guy should know better, perhaps too much specialization in his field made his brain go fritz.
