Nothing good can come from sticking my neck out on this, but: If I were paying for advertising for a software engineering position I'd get much better ROI by excluding women and older demographics simply because they're much less likely to be suitable for the job, statistically speaking, when we're talking about the wider population in general and not just software engineers. Not because they're less capable, but bec…
If all/most employers exclude workers based on demographics, then smart employers will realize that they can find great employees in those demographics. A good portion of Quant trading is based off a similar principle. If I can model priors and variance better than my competitors, I can make money.
And it kind of makes sense: it will take a few more years for supply in the industry to actually increase (especially for senior talent), while companies like Google are under the spotlight now and no one really cares about that 10 developer payroll company that Google poached talent from. (Not to mention employment laws work different for companies of different sizes)
To put it in trading terms, if your bigger competitors are sucking up all the supply of X, then you simply don’t worry about buying X if you can get by with Y anyways.