One factor that you probably like about the iNat Forum is the strict moderation. It keeps people focused on the topic of nature observations, and it doesn’t allow for personal attacks, or for going off on tangents.
Although we have discussed some Facebook groups that are even MORE strict, where you can have your post deleted, and you might even get banned for daring to speak the i word!
https://forum.inaturalist.org/t/i-was-banned-from-a-popular-fb-group-for-mentioning-inat/