No worries & Welcome!
That is correct, we have downvotes disabled though this instance. There was a big community post on it earlier over here: https://reddthat.com/post/110533
Basically, it boils down to: If we are trying to create a positive community, why would we have a way to be negative?
While that is also a very limited view on the matter, it's one I want to instill into our communities. Sure downvotes do help with "offtopic" posts & the possible spam, but at the current time of that post. No application thirdparty (a mobile app) or firstparty (lemmy-ui) had any features about hiding negatively voted content. (ie; if it was -4 don't show it to me).
By default (which is the same now as it was then) "Hot" only takes into account the votes as one of many measures about how "hot" a post is for the ranking. Up & Down votes are only really good for sorting by "Top".
My biggest concern, from then and now. Is that because we now federate with over 1000 different instances, and by design Lemmy accepts all votes from any instance that you are federating against, vote manipulation (10's of thousands) of accounts could downvote every post on our instance into oblivion. Or the even more subtle and more nefarious, down vote every post until it hits 0/1 constantly. You might assume that the posts are not doing well, and nothing is happening.
As Reddthat is basically run by a single person at this point in time and for the foreseeable future (3-6 months), adding downvotes would have added extra effort on my part in monitoring and ensuring nothing nefarious is happening. Moderation is still a joke in Lemmy, reports are a crapshoot and the ability for people to spam any lemmy server is still possible.
Until we get bigger, have more mods in our communities, and I can find others who are equally invested in Reddthat as myself to become Admins, I won't be enabling downvotes (unless the community completely usurps me on the matter of course).
I hope that answers your question.
Cheers
Tiff