>>You also seem to think everyone has a car and thus a driving licence

I don't see how those two are related. In UK driving licences are also used as de facto ID everywhere(you can even get on domestic flights using your driving licence lol), and everyone gets one when they turn 18 because just get a provisional driving licence(identical to a normal one but with an L on it to indicate learner driver), no car necessary. In effect everyone in the country has a driving licence even if they don't drive or own a car. And you just apply by post, no need to go anywhere,

Obviously it would be much better to do it like other European countries do it and just issue everyone with an actual ID when they turn 18, but what UK is doing is close enough equivalent of this. So if the US has the DMV and already has an easily accessible way for people to get driving licences......what's the problem?

This may be true in your demographic (it is in mine) but as of 2015 there were 45 million driving licenses issued and at least 55 million adults.

Old people don't necessarily have photographic driving licences in the UK.

Some would be caught out if their passport has expired.

You can use expired passports and driving licences to vote:

https://www.southend.gov.uk/elections-registering-vote/chang...

What's the problem?

Just look at the actual facts, as you say.

https://theconversation.com/almost-2-million-people-in-the-u...