I think government surveillance is an issue because people can be arrested or harassed for things. I still don't see what harm can come from a private company having my data as long as they don't share it or use it for something nefarious. I don't see the threat of that happening with google.

To be clear these are two very separate issues: government surveillance and privacy policies of corporations.

We agree on the first point and disagree on the second.

If I'm wrong on the second, please give me a plausible example of something google would do with user data that would be actually harmful besides sharing with the government.