> In Germany all voting places are wheelchair accessible.
There are accessibility concerns beyond just wheelchairs you know...
A person doesn't have to be able to get to a post office themselves to cast an absentee ballot. They just have to be able to fill out the ballot and sign it. Someone else can mail it for them.
Right, so they have to be able to reliably receive mail at a location fixed at least a little time in advance, and either send mail or give it to someone to send mail, and then it needs to reliably get to its destination.
Not all of those things are always easy for all people's situations.
As a practical example - see the difficulty that homeless people have voting in many cases.
Voting online as an option would possibly solve them for some people.