While I agree in spirit: after a recent rib injury I wasn't allowed to take a picture of my own X-Ray using my phone or even have a copy sent to me since "that isn't the policy"... very hard to say that data was "mine" until it is "released" to me.
There is an infinitesimally small liability that some "other patient's" data might be visible on scanning device, a horde of companies assuring asses are covered and without a legal obligation to give me all "my" health data per visit I don't see an easy path to using our own devices soon, unfortunately.
If you want that power, you’ll need to get your national government to change the law.
I’d love for this to be the case, but we’re going to need laws to make it happen. Banks will have to be forced into it and probably also shielded from liability in case the user does something dumb.
Maybe we can force them into providing APIs for us while we’re at it so I don’t have to pay Plaid if I want to build an app to track my finances.