You say that as if you know the setup of how computers are used in elections. You should check your county, to see if you can get certified as an election observer. It's very educational.

The computers used in elections have highly controlled inputs: no network cards, disabled USB ports, very restricted access by limited, accountable people. They are constantly tested for accuracy, with everything logged and inspected. Security is the most paramount thing, and you're talking like only you care about it.

Human counting is far less accurate, so the "no computer" notion is just stupid.