If you’re getting downvoted in an argument, guess what, that means you’re bad at making arguments.
I pretty much agree with your second sentence/point, but this is bullshit. I got so many downvotes on reddit for literal descriptions of my perceptions and experiences as a gay woman. Half the time there wasn't even a debate or argument happening. As reddit culture skewed more and more conservative, many technical and nerdy communities became actively hostile to the basic facts of my existence. Then there are all the downvotes I got for believing in human and minority rights while downthread with some bigots. My more visible posts on the same topic would be solidly upvoted, while everything below the arrow was smashed below zero because only angry little shits followed the discussion that far. I agree that the system on Lemmy isn't meaningfully different and will inevitably have the same effects, but sorting by voting over-centralizes the meta and destroys real discussion and diversity of experience and opinion. It literally only works in limited circumstances within subjects that have objectively correct answers. Anywhere else it introduces so much chaos.
What I'm saying is that these weren't arguments. These were people weaponizing the voting system to keep minorities from self representing. I was downvoted below zero on a car repair sub for having runflats instead of a spare because I worked in and commuted through a bad part of town, often after midnight, where I wouldn't feel safe stopping to change my tire. They made it clear that I was unwelcome because I am a woman, because my description of this gendered experience was unacceptable subreddit content.