I understand where these questions are coming from, but many Western countries have decent legal systems where data unrelated to a case cannot be used by law enforcement and this will be tested by both prosecutors and judges.

I'm currently working in LE and I would not be allowed to look at customer data if that was seized during a search related to an investigation of Uber. I would not be able to just grab the ride data of a subject of another investigation because that would be illegal. If I did do that, that evidence would be thrown out and I would be reprimanded.

I understand there are countries where this isn't true though, or where people are worried about the state of legal proceedings in their countries. But that doesn't mean Uber or any other company can just destroy evidence on the premise of securing customer data.

Also, I highly doubt that Uber hosts their customer data on workstations in their offices. At least I hope they don't.