Edit: obligatory explanation (thanks mods for squaring me away)...
What you see via the UI isn't "all that exists". Unlike Reddit, where everything is a black box, there are a lot more eyeballs who can see "under the hood". Any instance admin, proper or rogue, gets a ton of information that users won't normally see. The attached example demonstrates that while users will only see upvote/downvote tallies, admins can see who actually performed those actions.
Edit: To clarify, not just YOUR instance admin gets this info. This is ANY instance admin across the Fediverse.
Well, I am not a developer in this field, so I don't know what's possible, and what's not. All I know is that this needs to be fixed one way or another, or this whole platform will fail. If our information is all available publicly, we will be better off just using Facebook/Reddit/Twitter - at least these platforms don't leave our data out in public view.
We need to stop saying what's not possible, and instead talk about what is possible.