Okay, so we're all at the sausage factory one day making sausage. We notice that we're shoving an awful lot of rat shit into the sausages, but the boss says it's more profitable this way. We get together and tell the boss, look we're not gonna keep shoving rat shit into the sausage. To you, this is illegitimate, because we're paying our rent out of profits from the rat shit, after all. So fine, we decide to leave. Now the boss hires new employees, and the process continues.
Ultimately, I think hypocrisy is the wrong lens to look at this through. Activists are not seeking purity or moral perfection, we're seeking change. Change requires organizing, which has to start within the company. An individual employee does fuck-all if they leave by themselves.
> We get together and tell the boss, look we're not gonna keep shoving rat shit into the sausage
Absolutely no one at Google is doing that. What is happening is that these employees are telling their bosses "we would prefer not to shove rat shit into sausages" and the bosses are saying "no". Then these employees are going home and posting about it on social media and going back to work making the same sausage the next day.