You can't use the words "reasonable debate" in your post after you've immediately jumped straight to some mythical worst case scenario of a 5 year old being given a device with no supervision and somehow managing to immediately find their way to some sort of super duper snuff porn that will scar them for life.
I agree going to the worst-case is a weak technique, and this is what the OP does:
> "Age verification" means that everyone who does anything online will have to submit to fine-grained tracking and recording of all their online activities.