I have self-published a couple of books. I do enjoy writing, but what I enjoy even more is being read. If I honestly felt my books were never going to be seen by anyone, I wouldn't have written them. Providing value to other people was the main source of meaning and joy for me with those projects.
I used to enjoy writing but now it's so easy for anyone to self-publish a book on Amazon that I don't see the point.
I used to enjoy running but all the fun has gone out of it now that motor vehicles exist that can move faster than I can run.
I used to like sky-diving, but then hail stones ...