This gets to the heart of how divisions inside a company justify their budget and where human self-preservation kicks in. For e.g. A lawyer inside the company HAS to be on the lookout for supposed infringements of IP or situations where their "expertise" is required.
The idea is that once you have any apparatus in place, and funds allocated to the maintenance/operation there of, you will find that people come up with creative ways to use that apparatus to either cement their position in the company or to improve career prospects. This applies to lots of domains, the obvious one being the government. Once you have a drone program, you'll find that someone somewhere WILL find a way to justify its usefulness.
My main problem with data collection is the permanent nature of it, where someone somewhere at some point in time, possibly when the computational costs become feasible, will come up with a seemingly innocuous use of the data that will spiral out of control. Also, is Google hack-proof? Judging by the lawsuits around the self-driving division, apparently its trivial to steal data if you're on the inside.