It's so much easier to comment on Lemmy because it isn't a toxic cesspool waiting to tear you apart
It feels like people are a lot nicer here than on Twitter and Reddit, and even when people disagree, it's generally civil and not an all-out flame war. Also, there's no algorithm promoting outrage all the time.
For me, the anticipation of toxicity was a huge deterrent for me ever participating in real discussions, but here I feel like I can be myself.
They always do. Though in lemmys case I imagine it'll be bigger instances running off with delusional admins thinking they're some exception to the rule.
Also, pre-digg, most people used webforums like vbulletin or phpbb. Which, honestly, I prefered to this centralization of information you have today on reddit/discord/etc.