Perhaps because counting tens of thousands of near-identical pieces of paper is exactly the sort of repetitive, robotic task we've entrusted machines to perform more accurately than humans since at least the 1940s.
But a non-hacked vote tabulating machine will still do the job better than non-hacked humans.
Add a high enough percentage of random hand audits of the machine but counts to ensure they're functioning correctly, and you should get a reasonably high confidence that you have the most accurate count.
> Add a high enough percentage of random hand audits of the machine but counts to ensure they're functioning correctly, and you should get a reasonably high confidence that you have the most accurate count.
Defies the purpose of electronic machines completely. Why use machines + lots of auditors, when just more counters (worth less than auditors) could do the same job, with a much higher cost to corrupt?...