But how do you avoid from becoming skeptical, like, "Why bother focusing on quality, if it's going to waste anyway. Maybe I should keep throwing shit (quantity) and see which ones stick."? So you end up producing mediocrity and leaning towards luck.
The other thing is to conquer the fear of rejection. There are a lot of people who get stuck not submitting stuff simply because they're afraid of getting rejected. But not trying is as good as a rejection.
You are going to need luck regardless of the quality. Merit is how we expect the world to be, not what it actually is!
The author's point is increasing your chances of success by trying more. Which, if you are unlucky a lot, actually makes sense.
Basically sounds like a way to get to the "10,000 hour rule".