Like, everyone in the industry shows agency reps a good time. Back a decade ago, FB reps used to get the clients drunk the night before they'd see Google on the principle that they'd remember less.

However it's worth pointing out that Google as an org have absolutely hated ad agencies for many years, in fact being nice to the agencies was a strategy used by FB when I was there.

I'm not disputing your point about optimisations, but the notion that Google like ad agencies is just ludicrous.