When I retired my social media accounts a couple of years ago (facebook, instagram, twitter) I remember a distinct feeling of triumph that felt worthy of sharing. Like I finally opened my eyes to see them for what they really are... but in the end it was nothing more than that and I quickly occupied my attention elsewhere with other activities.
Now this is only my narrow perspective on it, but I can very easily picture a scenario where for a lot of people, some level of inflated self-importance (granted by the very platform they are quitting) only heightens the perception of magnitude with them actually leaving it. So I can see where treating self-imposed exile becomes an act of heroism of sorts.
But I wholly agree with you, and I have a hard time sympathizing. All that is required is a little effort in giving yourself some distance from it and your free.
Our world is an amazing place offering an unlimited number of a hobbies / activities to engage in. People fall into and out of love with such activities all the time. People also take / leave jobs all the time.
Not a big deal.