Much more interesting questions that might get revealed a bit:
Does Google treat minorities appropriately? Is Google covering up ai ethics research? Does Google care about AI ethics/bias?
Google cares about AI ethnics because talking about it gives those people, especially higher ups, an imagined sense of significance and adrenaline rush of being a savior.
But in reality, AI ethnics is just a gloried showroom of diversity/inclusiveness.
It is not a product, it doesn't generate revenue, in corporate world, nobody cares.
The only reason that department exists is because it was regulated into existence.
So, no, Google does not particularly care about AI ethics. They care about not getting harangued by the US government.
From what I've seen, I agree with Gebru about AI research, but this letter has too many problems itself.