I would be perfectly fine with having a checkbox which toggles this stuff. Then you could turn it to on, I could set it to off.

The problem is, there is no checkbox and data is forever. If one tries to think a little bit they can find some nasty possibilities of how that data could be abused to harm them, either out of malice or completely by accident (hope your name isn't "Archibald Buttle").

With enough data, everyone is guilty of something and today's teens will feed the Google machine for most of their lives if something doesn't change.

But just to be fair - you should have the freedom to upload all your data to whoever you want. Masochism is odd, but not particularly objectionable.