I guess that's one way to delude yourself. I'm just here (different big tech company) to get the biggest paycheck for the least amount of harm I could inflict on the world.
That said, many googlers do _not_ end up impacting millions or billions of users. So GP is a lucky one. Google has a lot of people working on infra, internal tooling, and subfeatures within products that don't / are hard to connect to usage.