It doesn't make that argument either. It makes the argument that since less women (will on aggregate) be interested in CS then men, less women will be in CS. A

It doesn't make that argument either. It makes the argument that since less women (will on aggregate) be interested in CS then men, less women will be in CS. And that less women being interested in CS has _some_ basis in biological differences. Whether you agree with that or not (the research does support it pretty strongly, but is certainly not settled), it is a reasonable argument.