The characteristics of paper elections are well understood and can be shown to be sound very easily to any common citizen. The massive attack surface of electronic elections is poorly understood even by technical people. It's a massive amount of complexity and expense for exactly zero gain.
If I wanted to see paper ballots, how is that different from wanting to see electronic ballots? I'm not confident that I could successfully petition Government for paper ballots just as much as I could sue a given contractor for same electronic records.
Electronic voting always requires trust in the administrators.
This is not allowed in many jurisdictions. You can watch the before and after part easily, though.
I have no such confidence in electronic messages. Unless they're plaintext.