

Relevant xkcd: Average familiarity
You severly overestimate the average persons tech literacy even when you try to correct for it. Booting from USB is already a really advanced topic.
Though creating a lemmy account is not that complex. Typically all you have to do is fill out a form on the websiten instructions included. The problem there is not the tech literacyn but the willingness of the people to even interact with systems they don’t know, like finding a home instance or understanding the concept of the fediverse. Most people could create a lemmy account, though also most people wouldn’t.
Thats why other countries are doing it that way. The problem is, that the US system makes it very difficult to get an ID for its long list of undesireables. And with that I mean everyone, who is not white, heteronormative, cis and not-poor. If the US fixes these problems and issues IDs for every of its citizens, then requiring the ID for voting is a good idea. Unfortunately that is a big big If, carrying a lot of weight.