Of course it's probably also possible for it to be that you're uniquely valuable to Google in the context of their other people, infrastructure, and strategy. Especially as people acquire specialized skills and experience, they can be worth a lot more to some companies than others.

This is true of everyone of course. Even a more or less commodity junior Javascript developer isn't worth much more than their generalized ability to do random tasks to a company that doesn't do any software development.

But some people have a skillset and track record that is very valuable to some companies but that would make it hard to be hired at most.