Well, frankly, I think your diagnosis is woefully incorrect. Google made 2 very straightforward
conscious decisions regarding hiring that are responsible for their current problems:
1. They quite obviously put the bean counters in control. Google famously originally said "they were a different kind of company", and early on, they were. But it was a leadership decision to forever squeeze each additional penny out of their ads systems. I think some people may put the "turning point" as to when Ruth Porat joined, but I think it's colossally unfair to blame her - after all, she did a phenomenal job raising the stock price, which is basically the job of the CFO. But setting the vision and goals for the company comes from the very top.
2. Regarding their lack of ideological diversity, that was also a very conscious decision. I went to a Google hiring event about 8 or 9 years ago, and the hiring manager was very clear that her number one goal was increasing diversity by raising levels of underrepresented groups, and it was stated as a source of pride. Not technical excellence, not innovation, etc. If anything I think that mindset was inculcated at some of the elite tech companies before society at large.