As for whether a single product manager has that level of control over the serving product... query term rewriting has been a google strategy for quite some time and I doubt a single PM really can influence the product this way and still manage to launch, but as I don't work there and am not privy to the internal details of this product's launch, I can't really say.
That the product is full of disrespect for the user, that I agree. I don't envy the paeans trying to get promos by associating their name with gemini internally.