I imagine the reason why comments here are more constructive is because Lemmy is perceived to have a high technicality-threshhold (you have to be somewhat familiar with technology to make an account here - even though that’s not true). That leads to only people with a high enough motivation to sign up here.

I think it’s important that we grow and find new users, not because I seek growth, but because I seek diversity. We need more people, more opinions, and more different perspectives.