You may be right, but that doesn't prevent them from using those same rights for other purposes (much like TSA searches being used to find drugs rather than terrorism).
If Google really means it, and wants it to be clear, they could put it right into the TOS: "Google may do X, when it does so in order to provide feature Y".
If Google really means it, and wants it to be clear, they could put it right into the TOS: "Google may do X, when it does so in order to provide feature Y".