First and main point - currently it is either hospitals+insurance have this data or hospitals+insurance+google. Even without paranoia or conspiracies it is logi

First and main point - currently it is either hospitals+insurance have this data or hospitals+insurance+google. Even without paranoia or conspiracies it is logical that N entities is more trustworthy than N+1. And another thing - hospitals are much more regulated (insurance - I don't know) by government and due to their byzantine structure and ancient IT systems it is harder to do mass extraction of data. One patients data - easy, a small bribe to one or two humans and it's yours. Data on million of patients - much harder. Google on the other hand has means AND motive to do anything with any amount of personal data. They can set high frequency trading with it if they want. Nothing to stop them, zero regulation, offshore management, offshore funding.