The main reason they are wrong is most of them are trying to use science to prove their personal politics and the bend science to fit. The IQ test must be invalid because it shows some races are smarter then other races. They can argue the women make as good distance runners as men but they can't argue that women actually win any major distance running events.

There is more to sports then strength so it should be easy for you to point out the sport where both sexes compete and women do as well at the professional level. NASCAR is the only one I can think of but I am sure you can do better.

I don't know why men are better at math but if you won't accept the simple fact that men do better on math test then I really don't think it is possible to convince you since facts seem to be ruled out. I would assume the argument that it is a field dominated by men is irrelevant as well? Doesn’t mean a woman can not be very good at math but it does mean that attempts to get woman to parity in the field may be misguided. If you have to handicap them then it is hard to argue they are equal.