I recently learned that voting on lemmy is not anonymous. Anyone can get information about who has upvoted and downvoted a post or comment.
In combination with your IP, this is a massive privacy (maybe even physical security) risk. Also, people can target you for your votes.
Sadly, this is something where I would prefer Reddit over Lemmy. Big tech scrapes data from both places anyways, at least Reddit is safe.
Piefed did it with voting agents and it worked fine. The reason they rolled it back was just forum politics, because admins didn’t like not knowing who was voting, even though they could just ban the agent if they wanted. This, incidentally is just more reason to hate the idea of public votes.