They’re really not meaningless though. For one thing, they allow moderators and admins to more easily detect trolls and bad faith actors. And on platforms or with add-ons that allow better tracking of vote history, it allows the user to more efficiently moderate their own experience, should they so choose.
Also, I think you’ve got to be kind of an asshole to not recognise that a little bit of validation from communities that you participate in is a nice thing to have and that downvotes can hurt to an extent, even if it’s not the same as getting physically slapped. And to be clear, I’m not pointing at you or anyone, I’m just riffing here. I haven’t even seen downvotes for a while now.
So yeah, I’d say they’re meaningless in a video game sense. You’re not going to win any prizes with them. But there’s a reason they exist, plus no one is immune to the effects of positive or negative reinforcement.
All depends on which app / UI you’re using I guess but it should look pretty much like Reddit almost everywhere. The only difference here is that there’s no grand total at the top of your profile like a high score. But when I was signed up on world, in the app I’m using you could see separate up and down vote counts for everything.