I think you're misunderstanding what he means. He's saying that Google employees don't have access to that kind of information (due to access controls, logging

I think you're misunderstanding what he means. He's saying that Google employees don't have access to that kind of information (due to access controls, logging of access, etc), likely in response to your "would you be uncomfortable with your friends collecting arbitrary amounts of data from you" question. I'm not saying that his comment was a sound rebuttal to yours or anything; just noting that he was talking in the context of "your friends, neighbors and former coworkers" accessing your data and you're talking about "Google" accessing your data, and those are potentially very different things.