Good, you do not contest that, which, frankly, would have been a silly thing to do.
> After I just said, "there are fewer Asians playing professional basketball because Asians tend to be shorter."
So, "there are fewer women in IT because women tend to be [biological argument]"
Now what here is the [biological argument]?
We've already established that there is at least one woman who is just as capable a programmer or software engineer as any man could be.
That means this woman is exceptional because either:
A) She has a specific biologically determined male trait
or
B) She is not exceptionally different in any biological way but somehow has a unique environment that allows her to be an exceptional programmer.
Occam's razor suggests B here, in the absence of extra-ordinary evidence to suggest A.
Therefore it would be prudent for any employer to offer a benefit for women to shortcut the much complicated and convoluted environmental and social factors that are involved in the B scenario.
Any interlocutor who claims to have found evidence of the [biological component], and as such support A, but does not back this up rigorously, can be assumed to be working against the interests of the employer. Whether this is for ego, political, or religious reasons is irrelevant.