Yes, I agree his suggestions to stop those initiatives is a bad idea. And that it doesn't follow we should stop those because of that study.

But regarding

> and there's also no rationale to entirely discount cultural factors

He doesn't do that. First, the section's very title is

> Possible non-bias causes of the gender gap in tech

and

> I’m simply stating that the distribution of preferences and abilities of men and women differ in part due to biological causes

(emphasis mine in both). Proposing that biology may play a role is not the same as saying that biology is everything.