Which seems reflective of the underlying pool of applicants.
It would be interesting to see what their application/success ratio demographics are like.
1. http://www.bayareacensus.ca.gov/bayarea.htm 2. https://www.wired.com/story/googles-employee-diversity-numbe...
How many of them hold relevant degrees for job openings at Google?
There's even a sourced 2018 article about current hiring practices trending away from degree requirements for you to peruse:
https://www.cnbc.com/2018/08/16/15-companies-that-no-longer-...
It's not about the degrees (relevant or otherwise).
Of course the most important thing is: out of minority applicants who are qualified, what percent are hired? Because we may expect a smaller proportion to be qualified due to systematic barriers that they face. Google is not necessarily in a position to fix those.
I'm willing to bet that Google's demographics hew pretty closely to CS graduate demographics. You need to look farther upstream.
I feel "just wing it" can lead to somebody talented from a non-traditional background getting a chance at a great career that they would be auto-rejected by google at the resume submit phase.