Client confidentiality and anonymity are not the same thing. Let’s back up for one second, because I think we are coming at this from completely different backgrounds. Are you familiar with the dining cryptographers problem?
The mistake that you and others are making is looking at the security of electronic voting systems in isolation.
You aren’t comparing them with paper ballots - which exhibit endemic,
intractable, frightening levels of insecurity, and a fundamental
reliance on unprovable trust - and asking which is more secure. The answer is blindingly obvious.
You apparently haven’t looked at any of the E2E accountable systems out there. I’m not saying the current system can’t be improved upon. I’m saying the idea that going completely electronic has issues as well.