This is probably the most overlooked comment here. I'm guessing that Google just DGAF about any individual employee. They're not short of candidates, so why waste even a tiny amount of time customizing their contract terms when they can just revoke it and move to the next in line.

That's not actually what happened, Google, much like any company wants to hire people that are "good team players" "will be loyal to the company", "don't cause trouble", and "show gratitude for the opportunity given to them". So either you play the game or you have enough leverage to get special treatment(or you work somewhere else). They want good corporate drones, not individualists that protest when privacy rights are signed away.

There's also the option to just not install corporate apps on your personal device.

Exactly, they want cattle, not pets.