There may be a lot of reasons but I understand that few of the OGs of the bitcoin scene are here only and historically a lot of information on this forum is worth knowing for understanding the proper approach to crypto.
Social media tends to put up a skewed approach to anything they publish about. I dont trust news media or social media to that extent but things have improved there as well.
This forum also thrives on its signature campaigns, without which I guess it would not have so much traffic.