That just a function of it being a long-term and established community. And likely a bit of agreement with your broad cultural and political views. Right now Reddit is more likely to have information on a random video game than Lemmy, but that doesn’t mean their structure is inherently good for producing information.

A federated system where you federate with everyone without limit is a good way to get a lot of bad shit, but that’s not how the Fediverse actually works. Instances defederate from other instances that are dragging down the quality of their social network. Most importantly, if your admins go bad and decide they want to not pursue truth but instead craft a narrative, you can move instances to one that has the standards you want while only losing the content that was actually on the now-bad instance.