> Before decrying lack of diversity in field X, demonstrate presence of one in the pool of qualified candidates.
No, after identifying the lack of diversity in field X (or, in the case, Company G), finding the lack of diversity in the pool of qualified candidates tells you where you need to work if you care about diversity. But it doesn't mean "there's no problem to do anything about" -- as Google recognizes, hence whey they point to the steps they are taking to address the problems of lack of diversity in the pool of qualified candidates.
Your comment presumes that diversity is something that is axiomatically desired. I don't - just like I don't order my bookshelf based on gender/race of the authors and decry lack of diversity there.
I personally only care about it as far as principle of fairness. Ie if one can show that company X discriminates against persons Y (by demonstrating that sufficient number of qualified candidates Y are turned away) - then it would register on my radar. Otherwise I consider 'diversity' as a tool to push through quotas that I personally detest.
No, it doesn't presume that diversity is axiomatically desired. It has as an explicit condition ("if you care about...") that it is desired, but whether such desire is axiomatic or a consequence of an a posteriori conclusion about instrumental utility of diversity makes no difference.)
And, while your statement of your personal biases about quotas are, I suppose, revealing of just that - your personal biases - I am not sure what you think they add to the discussion. Certainly, you can't think that a statement of what you consider diversity to be an a secret code word for unaccompanied by either evidence or logic justifying that consideration says anything about anything other than your own bias.
No, after identifying the lack of diversity in field X (or, in the case, Company G), finding the lack of diversity in the pool of qualified candidates tells you where you need to work if you care about diversity. But it doesn't mean "there's no problem to do anything about" -- as Google recognizes, hence whey they point to the steps they are taking to address the problems of lack of diversity in the pool of qualified candidates.