As I understand it, Google wants to "organize the world's data": that means all of it, secret, public, private, legal, illegal, ill-gotten and freely handed over. There's no "malevolence", Google is not a person. It's an organization and hoovering up data is its raison d'etre. Unless regulators force it to do otherwise, it will gather and store data.

This is the company that set up a fleet of cars to take photos of everything and snort up wifi traffic while they were at it. https://www.wired.com/2012/05/google-wifi-fcc-investigation/