The reason it is different to the FDA is because a restaurant can't exist without serving food, whereas a company providing a camera app can exist without runni

The reason it is different to the FDA is because a restaurant can't exist without serving food, whereas a company providing a camera app can exist without running facial recognition algorithms on the photos that are taken. And "opting out" of the data-harvesting companies isn't akin to removing yourself from civilisation. You can still have photos, you just keep them on your own storage and don't give them to data-harvesting companies.