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.
Also a reason why VPNs are not a security measure, rather a convenience way of working that’s been rebranded these days as security measure. They claim they protect your privacy online, but all it does is changes originating IP address of request. If you browse anything through HTTP protocol they can easily see what you are browsing except now spying on a single person got a lot easier. You just go to one VPN provider and force them to hand over your data.