Nationally regulated, sure. Verified with a physical copy (or a different system), sure. But banned altogether? You might as well ban everything in the world that is digital, as none of them are fool-proof.
Voting isn't even that important. The wrong guy gets picked, what happens? Same bullshit as if the right guy got picked. If your choices are "Hitler" or "Jesus", then your system is just fucked up, and making voting fool-proof isn't the way to fix it.
In addition, electronic voting would be a boon to democracy. It would provide another avenue for maligned minorities in remote areas be able to vote, when things like paper ballot voting in the middle of a pandemic might fail or be error-prone (esp. when a fascist fucks with the postal system), or local authorities enforce racist requirements like a physical ID card.