The point is that you don't want to have to trust individuals or small groups of people. There are ways of manipulating a paper election, but that's why you ha

The point is that you don't want to have to trust individuals or small groups of people. There are ways of manipulating a paper election, but that's why you have judges and election observers. If the count is done in a decentralized way, and the precinct results posted, you have to physically compromise the vote in many precincts. Doing this on a large scale runs a high probability of someone noticing. With these zero paper systems, there is no observability. Even if everything is sealed, you don't know what the software inside is doing. You probably don't even know what software the device is running, because the machines are stored in some warehouse for months at a time, with who knows who having access to them.