Maybe for pointless votes like American Idol or Formula E fanboost that's fine, although it seems like massive overkill to me. You're still going to need to justify the energy bill/incentivize miners, and these systems have a central authority that could run a regular voting system anyways.

The issue I have with electronic voting of any kind is that it's a huge and valuable target, it's pretty much guaranteed that multiple hostile nation states will want to poke holes into these systems. Introducing crypto doesn't do squat to prevent all sorts of nasty problems, including information leaks and stolen private keys. Given what we know about how most people handle basic passwords, I think paper is probably the most secure form of voting we've ever seen.