Also - this article ends on such a weird note given the message that the rest of it delivers. The author has finally realized how valuable it is to have something that gets them going, regardless of whether or not it ends up being "useful", but then immediately stumbles over the fear of it not lasting and failing to achieve greatness in it and sharply concludes with that sentiment.
Perseverance through intermediate-ness into greatness is irrelevant to enjoyment. Sure, be great at your hobby if you're driven to be great, but if you're looking to maximize enjoyment, it's much better to focus on a) embracing intermediateness, and b) exposing yourself to new things so you can find the next hobby that will light you up.