Just joined Lemmy today. From what I understand, there are different Lemmy instances that host different communities. I supposed that to interact in a community hosted in a certain instance, I would need to create an account for that instance. Ended up creating 10 different accounts.
I use down vote as a I disagree with your take button, so do see merit in not being there. Also seen in the past where some tech suggestion is just downvoted, but nobody left an indication as to why. So it might also push people to actually explain why something is incorrect so those who come across the comment later can see why.