I still use Reddit for niche topics and for polarizing topics. Lemmy feels like groupthink to me, especially about politics. It’s always “Ukraine good, Russia bad” and “Palestine good, Israel bad.” I like hearing both sides, but divergent opinions get smothered there.

When someone disagrees with you, you have the opportunity to more clearly define what you think. This might mean changing your mind to a greater or lesser degree; it could mean understanding more completely why you hold the view you already have. If the votes show that a lot of people disagree with you, well, conventional wisdom is often enough not very wise.

In my experience, fediverse people have been more reasonable than reddit people - but you're going to find petulant children on any public forum.