I kept busy writing games, doing art, making things from wood before my career/family, I see no reason why I will not again when retired.
As I do have a family (and nearly an empty nest now) I have become quite comfortable not having much of a "social life". I still want friends, still need the occasional connection, but it is not nearly as central to my life as it was when I was younger.
No, I expect I will do just fine as a retiree.
(Maybe I should add, I still have managed to squeeze in projects this whole time in my off hours even while holding down a job + family. I know there are plenty of unmotivated people and so maybe I was not the target of the post.)