Just because you can't see where the data you're plumbing touches the world doesn't mean it doesn't have impact.
I work on one of the edges of those engineering efforts. On one side I see first hand how detached engineers at Google are from the things they build and on the other I see people's lives being defined by using those products / services. That impact is real and I think it's at a level that very few googlers respect because they're not lucky enough to be on an outside edge like me.