I think a ID card is easier than a driver's license. Not everyone needs or wants a driver's license. If you don't have a driver's license, how can you vote in the US? Do you need a passport?
It depends where you are. Some states, like mine, require ID to vote. Some don't. Some have strict rules on absentee ballots. Others allow "vote by mail" or ballot drop boxes.
I just filled out a piece of paper to register to vote, mailed it in, and then when I showed up at my polling place I signed next to my name on the voter roles. Post covid they they just mail you a ballot now and you mail it back or take it to a drop box. If you want to vote in person you take your mail-in ballot and surrender it and they give you a regular ballot.
