I agree with you that Google, an advertising company, would benefit greatly from secretly including a microphone (a-la Facebook giving you ads for stuff you've

I agree with you that Google, an advertising company, would benefit greatly from secretly including a microphone (a-la Facebook giving you ads for stuff you've only spoken about out loud) however I disagree with your insinuation that the person you're replying to is a pro-government or pro-Google shill. I think Occam's razor in this scenario can lead you to two different conclusions.