At the same time, perhaps such a system reduces the surface area for bad actors. Now, perhaps, just the registry/database of UUIDs is a primary target.
Not allowing people to photograph their ballots, to vote in public, etc. is a protective measure for the voter making it difficult to prove how they voted.
It's a real issue. There are lots of people who have jobs that they use to support their families where they have to deal with organizations that they disagree with politically. Currently they can pay lip service in public, but vote their conscience in private. Making how people voted public record would affect a lot of people. Substantially more than, for example, the number of people who would be inconvenienced by universal voter id laws.