Perfectly put.
I use FB in much the same way, and admit I am sometimes fascinated watching the flow of conversation.
Interestingly, in deriding social media sites I think we forget that AC is as much social media as any other. Defining something as a 'forum' doesn't remove it from the rank of social media.
I belong to a couple of other forums, one for truckers, and it is amazing how similar the boards can be. From 'What are you listening to today?' thru 'What's your favourite....'. Truck forum even has a 'I hate FB social media' and it is only because of its (as here) specialist nature that it is different. It is interesting that, considering we're Aspies, this site is actually quite social
Whether it be social media or forum we hold the power to join in or step aside.