Other people have made good points, but one I've noticed is that there's no advertising or profit motive (so far) and there's also no leadership that encourages dark patterns like increasing negative engagement through encouraging stuff like doomscrolling or starting or continuing arguments.
I'm on Kbin, and I like how by default all the notifications are turned off. So people aren't automatically told to respond to every little thing they participate in. If they really care, they have to manually go back on check on things they wrote about or were engaged in. Makes it less likely that people will argue endlessly, lowering the quality of posts and replies, and derailing them with long subthreads of off topic discussions or arguments.