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.
That’s my only concern. I don’t mind my comments to be public. That’s what a public place is, unlike other social media platforms who claim to be but they’re not. It’s, like you mentioned, the upvote/downvote system that I’m worried about and will refrain from using. Because it is public, too, it feels like it lets people read your thoughts. So, I’ll refrain from using it until it’s fixed.