It’s generally a lot less pretentious, which might appear as a lack of “intelligent” comments. Most Lemmy users just don’t spend hours trying to write page long comments on obscure topics that nobody else here cares about.
Also, in the more specific communities, lots of things are taken for granted. Places with more users will more often have the “todays 10000” user, who just discovered something that is new to them and then decides to write about it in detail. Lemmy is more polite that way: Not reposting noob stuff on a daily basis for karma or whatever point system brings it up constantly on other sites.
There’s a dam, so I guess it’ll be possible to grab it with a crane from the dam or shore.