Once we got away from paper ballots fraud became rampant. Go to the store and buy a hundred bucks or so worth of groceries. Watch the register. Chances are very good at least one of the items will scan the wrong price. I wonder if stores do that intentionally because most people won’t catch it.
It’s the same with electronic voting. I wouldn’t be surprised if the poll workers are well versed in how the machines work. So, how do you ever know your vote is registered properly? I voted on the first day in Texas and didn’t even get a receipt.