It's fine.
The demographic of dumb conspiracy theorists and other tin-foil-hatters who opt out will be underrepresented in research data, so their rare conditions will receive an inferior prognosis.
(, Sun 6 Jun 2021, 0:50, Reply)
Future sale to commercial interests, insurers etc. then, whoops the data is stolen.
(, Sun 6 Jun 2021, 16:31, Reply)
If I could be sure they would use the data in a careful and considered way with all the relevant privacy it deserves, then I’d happily assent. However, I’m not convinced they are capable and I’m convinced that they’d sell the dataset to anyone with the requisite beans to pay for it.
(, Sun 6 Jun 2021, 16:55, Reply)
So what are you going to do?
(, Mon 7 Jun 2021, 7:19, Reply)