It was referring to hours of practice so 10,000 hours made you a master but what the fuck constitutes 10,000 learning cycles of self discipline? Has he spent 10,000 hours sat in meditation like a monk? I highly doubt it. It’s nonsense the author is using to try and give himself some credibility.
He also links to a blog post describing his “somewhat hardcore work routine” and how adhd is his “superpower”. It’s a hard pass from me.