It’s not clear to me that most of those use cases will be served better by a blockchain rather than a regular centralized service… but also examples like the camera don’t really work, because someone could still use the camera to photograph a generated image (for example), or hack the camera itself.

On top of that, up until this point in time, Bitcoin has been the opposite of secure. The entire history of it is filled with people constantly losing money and being scammed with no real recourse.