I don’t know what “being registered to vote” means exactly in the US, but intuitively it sounds like an unnecessary level of complication and an undemocratic practice.
Not that my country (Italy) can be taken as an example, but even being it the paradigm of red tape and overcomplicating things, people automatically get a voting card wherever they’re living and they vote.
It feels like there’s room for improvement tbh.
It’s the narrow thought process of one who has always lived in the she spot, I would imagine.