Sure but they’re also sold secondhand. Also people can be born in one country, but move to live in another one… bringing their devices with them. Apple’s DRM can’t be tied to hardware.
Why not? What happens in the examples you gave? The EU won't forbid such devices entering the EU or they'd have to confiscate them off tourists. How many Americans do you know who have EU devices and vice versa? That issue may be negligible.