I've noticed this as well.
However, a simple fact of writing is that inspiration won't carry you forever and whenever. It's important to be able to sit your a$$ down and write even when it feels like pulling teeth - there always will be moments that just won't inspire themselves, you have to slog through it. But if the logic is it's a hobby -> it should always be fun -> if it's not fun it's not worth doing, chances are you'll never actually finish anything.
It's like getting a new toy, and only playing with it until you get bored.
There's plenty of popular IFs I dislike, but still respect their authors for sticking to their work and providing updates.
That's my thinking too, but even if you view it as a hobby right, you publish it, so now, it is
public. It's not just you and your four walls, but now, you have people who are waiting for the story to continue, and who are following you along
just for the sake of the story that you started. Don't they feel any type of obligation towards them? Why make it public in the first place then? Why not just create it in silence, play it for yourself, and be done with it? Don't go out promoting it, and then saying "oh, it's just a hobby, I can do it whenever I want and however I want", no, you can't. When you involve others, you simply can't. Blue balling people like that isn't cool.
As far as I remember, that's actually a reason L made that post, for the future writers. Like, if you are not completely sure about it, then do it privately first, see if you like it or not, and if you start going public with it, be transparent. If you want to ditch the project because of this reason or that, say so. Don't just disappear, because people are reasonable, they'll understand. And the ones who are not, I mean, ****, you can't please them all.