Because it burns you. That's the answer. It kills your skin cells and eyes the same way it kills the bacteria. Also, it is everywhere, it's fucking outside. The sun. Fucking stupid. Idiots.
Know what else kills bacteria? Bleach. So get chugging.
So stupid.
You conceded that no one cares if someone makes images locally then deletes them. But that's how they're all going to be made shortly.
Currently folks are sharing them because not everyone has the means to create them, some folks do, and share what they've made.
Once litterally every can just make them the moment they want to, no one will be sharing. Everyone will fall under that use case that you admitted no one would care about, which is exactly what I've been saying. It's 1. futile to try to stop, and 2. going to become so wide spread that we as a society will stop caring about it.