Do you mean by seem that people here seem to use them like that, or that they just seem like that to you?
I try to reserve downvotes for people who are actively harming the discussion. Downvoting good comments just because you disagree is pretty shit behaviour, and I guess the same could be said about upvoting bad comments because you agree with the opinion.
I’ll also suggest that downvotes can be used for something that is actively wrong, as in deliberate, but I think it’s abused for people who may be ignorantly wrong but not maliciously so. Once the downvote train starts sometimes people can’t catch a break even if they make amends. Really does a disservice and disincentivizes to people’s ability to admit being wrong or learn something new.
Yeah, on the internet it’s really hard to tell if someone just doesn’t get it, is trolling, or is maliciously ignorant. Sometimes a quick check of their recent comments can reveal their MO and tell you who they are.