This is not honestly engaging with GP's statement.
The benefit only accrues if the sharing is universal.
I am too private a person to agree with GP, but it does seem that most health issues that are visible to the passerby or casual acquaintence are less stigmatized than the ones that can be hidden. There might be something to the idea.
Of course you'd have to agree that de-stigmatizing is more socially important than privacy. I guess I'm privileged enough to have no stigmas, secret or otherwise, that I consider more important than my privacy. But I know others are less fortunate.
> The benefit only accrues if the sharing is universal.
The GP's statement wasn't for universal sharing. It was to force recipients of taxpayer money to share their medical records.
It's a gross demand: Force poor and old people to reveal their medical conditions to the world.