The difference is the comment section here has some coherency to it, isn't sorted to drive engagement, and the platform encourages discussion rather than trying to simultaneously make you interested in this thing but also the next thing so you don't spend too much time talking about this thing instead of seeing ads.

And no one is trying to use the comment box as a search engine or to message their granddaughter.

I also don't expect to see many comments on the race of the kids here.

Maybe the community will eventually go to shit here, too, but the difference between the various social media sites isn't just the content, it's the way the site is run and the kind of people it attracts and keeps.