So instead of whiteboard hazing, companies like Google could open up some positions to anyone interested (not just those with relevant degrees or experience), filter with a quick IQ test (or https://en.wikipedia.org/wiki/Wonderlic_test), and if the person passes a threshold, welcome them aboard and start training. There's no pipeline issues now, the only thing that could account for a non-50% split of male and female applicants is an average difference of interest, wherever that comes from.
Admission criteria should be blind to protected characteristics like gender and race.
fight to hire minorities by at least having one representative in each round of interviews for every opening.
with time, you might be the one company that hired that one role model that fixes the problem down the road.
but if you just go ahead and shrug that no minorities applied when you only advertised your opening in your facebook/linkedin, instead of taking the time to post in job sites, newspapers and other medias, then you are part of the problem.
It's perfectly okay to remain neutral and not get involved. In fact, if more people remained neutral (and were allowed to be neutral), the quality of discourse today would be a lot better because we would be allowed to be individuals instead of being forced to choose sides in an "us versus them" conflict. Furthermore, not allowing people to remain neutral is often a bedfellow of demanding ideological purity.
The issue at hand, "do more work to include minorities", is red herring. The cause celebre involved is irrelevant.
That however still doesn't change the fact that your toxic approach of "if you're not part of the solution, you're part of the problem" makes you part of the problem. Forcing duality is highly counterproductive.
That doesn't mean they aren't capable or able or interested, it just means if you look st, for example, the graduating classes of CS majors, they're disproportionately male. It's hard for a company (or an accelerator) to fix that.