Is there a claim in the “Possible non-bias causes of the gender gap in tech” section that you’re disputing? Can you tell me which claim or claims you disagree with?
Pointing out that there are no references really doesn’t advance your argument unless you’re asserting that a claim is untrue. Even then, it’s a criticism of the manner in which he presented his argument, not the argument itself.
(I suspect he didn’t include references because almost nobody disputes these points).
If you can tell me what you disagree with I’m happy to find the supporting evidence.