It's nice that the OP has a life where they are only answerable to themselves and where they can carve out time as they see fit and the only challenge is their own self-control. Noticeably absent from the article is the mention of any spouse or kids.
So what we're talking about with the OP is a single, self-employed, well-to-do knowledge worker who has found a way to exercise self-control. That's fine, more power to them, and it's great that this advice may apply to one segment of the long tail demographics of the internet, but the range of people for whom the OP advice "doesn't apply" is huge and includes far more than just people who struggle with procrastination and distraction.
It either works for you or it doesn’t. If it does - great. If it doesn’t - I hope you find something that does.
The only way we’ll know is if we share our experiences. I don’t see any value in critique here.
He has the first/top comment on the article. Seems to me he's binging HN, hitting that refresh button. Check his IP, he probably visits several times daily.
Many people are easily distracted and prone to procrastination. They can't easily switch from one task to the next, and they struggle to stay focused. I'm like that: it's why I'm commenting on Hacker News instead of writing the article I've been paid to. It's enormously frustrating to have goals and obligations you fail to achieve because your brain refuses to cooperate. A rigid framework that forces people like that to marshal their time and attention more effectively can be a big help.