Because the commenter I responded to said he couldn't understand why anyone would do what I do. There's an implicit question there that I was attempting to answer.

Good point about also owning the phone plan. But since I use Google Voice for everything (personal account) I'm not sure how much of that they can see (in their capacity as owners of my phone service), and like I said, I'm not doing anything interesting. If Google really wants to see my call logs of wife, wife, friend, mother in law, wife, wife, wife, dad, friend, etc. it's not worth thousands of dollars a year and an extra phone in my pocket to prevent it.