Is this Use of AI great or scary?

The WSJ reports that Google has teamed with Ascension to analyse personal health data for millions of people across 21 states without obtaining consent or even informing the patients. The (partial) goal is noble: "Google in this case is using the data, in part, to design new software, underpinned by advanced artificial intelligence and machine learning, that zeroes in on individual patients to suggest changes to their care." The report also states that "the Health Insurance Portability and Accountability Act of 1996, generally allows hospitals to share data with business partners without telling patients, as long as the information is used 'only to help the covered entity carry out its health care functions.'”