But elections are not about my vote. They're about everyone's vote. I care about not just the integrity of my own ballot, but the integrity of every other voter's ballot as well. And, given a system where most people will never do a complex blockchain verification of their ballot, or have a mechanism to be certain that no additional machine-generated ballots were added to the results... blockchain isn't solving the actual problem.
Don't be in love with technology when looking for actual solutions to actual problems.