I’m in the US and the weird mechanical machine that casts my vote is a black pen filling in a circle. That can be read quickly by a simple electronic machine or more slowly by humans if there is a question. It’s low tech and hard to influence on a non-trivial scale.

It is true that some places use much more complex systems and I don’t really understand the interest in those. It definitely don’t see any benefit to fully electronic voting, block-chain or otherwise. Voting doesn’t have to be efficient. It needs to be reliable, understandable, and believable.