Does anyone have a goal of 50% female developers? Can we see some citations for that? Most companies I've worked at claimed to be trying for 20%, and they were failing abysmally at it.
So Google wants to reflect the consumer base, so I guess we can take that to mean ~50% female devs?
It is very politically unacceptable to object to this intellectually lazy reasoning.
Perhaps if you went back to the days of women's liberation and somebody said "what next, gays?" they'd get dismissed too. That might be right, but it's possible they really saw it as a serious issue before its time.
Which includes a good portion of extremists of all kinds, illiterates, drug dealers, etc. And of course, half of it is made of people with below average IQ.
You want your company to employ the people that are best at the job, not a cross-section of the population along some randomly chosen axis.
And if people aiming for diversity don't have 50% as a goal, somehow I have never seen them name another number that they would consider satisfactory.