I’m confused. Your Apple Health or Kaiser Permanente data is already stored on the cloud. It’s not like it’s only ever store locally and if you lost your phone you lost your Apple Health or Kaiser Permanente data.

I already mentioned privacy being the only real concern, but it won’t be really the end user privacy. At least that particular concern isn’t the ball mover people’s comments here would make you think it is. Plenty of people are storing their medical information in Google drives and Gmail attachments already. If end user privacy from “the cloud” was actually a thing, you would have seen that reflected in the market.

The privacy concerns that are of importance are that of organizations.