Forcing one's self to write, forces more in-depth thinking about the topic, which can lead to surprising and unexpected revelations (which I would refer to as quality writing).
One doesn't need to keep the journey, just publish the destination. The reader doesn't need the journey the writer took, but the writer sure does.
After 10 years of doing a thing every day you'll be better than someone who didn't. And what's more they're likely never going to catch up, unless you completely stop and they start using your method.
And even then it'll take years.
And you should think of this other person as the alternative you.
Haha. You can and will hit a bad streak, it's inevitable. There is value in doing the thing.
Pretty soon all that practice adds up. YMMV. But like the article said it's gotta be action.
What is doesn't say is this is a way to build small wins. It only takes a small chain to create momentum.