This is unsustainable. It requires constant vigilance and turns the privacy matter into a cat and mouse game where we are constantly one step behind the worst actors. These systems exist everywhere in the world and they’re fundamentally inefficient. E.g. recycling, or “please bring your own plastic bag”, which relies on goodwill.
Compare to a system where you fix the incentives to automatically align everyone’s interests: e.g. bottle deposits, or a small fee for plastic bags. Now people will want to do the right thing, because it is aligned with their own interests.
The same holds here: fix this one instance with enough outrage, there will be a thousand more. Instead, let’s fix the misaligned incentives between app builders and users, so their invasion of my privacy costs them as much as it does me (e.g. GDPR).
This is how you make efficient markets: align incentives. Fixing everything on a case by case basis only provides temporary relief.
[edit: note that OP never said "don't do it", they just said "it's missing the point". which I think is a fair call. this one fix is good, but it's unsustainable.]