They'll find a yes-man eventually
Google never actually intended to follow through with any of their recommendations if it meant going against its financial interests.
I don’t know how these ethics professionals added value to Google. I _do_ know that repeatedly belittling your CEO and employer on a public forum might win you lots of virtue signalling points but not be constructive for the company paying you a salary.
Probably, but this also means that they didn't hire the best people for the job, just the people who would have looked better in the position.