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.
Ah yes, because the practical option is to be constantly switching accounts and instances based on what you want to look at for 5 minutes each.
I find it’s possible to be logged into two instances on the same browser, so it doesn’t need to be more difficult than switching tabs. (That may change, I don’t know whether it’s technically desirable, but if it’s relevant to someone’s interests…)