Quark's

There are absolutely echo chambers and polarization on Lemmy. It's definitely less noticeable than Reddit or Facebook, but its still there. They can definitely be good things too, but when the conversation is driven by one or a few people and everyone else constantly agrees or goes along with the status quo it becomes a problem.

For profit models seem to prioritize engagement over moderation, as long as people are commenting and driving engagement, even if it's largely negative, toxic, or even completely false, it's okay.

On Lemmy, at least for the most part, Toxic behaviour isn't tolerated and most communities are pretty good at discouraging false narratives. I don't think I've ever felt attacked here, or really elsewhere on Lemmy, for providing my views in a comment section like I did on Reddit, even if they were contrary to the prevailing opinions. When attacks and negativity are not tolerated actual discussion is much easier.