I find Sam Altman's advice on startup completely and utterly useless. They're akin to the "How to become a millionaire" books. I've said this in the past [1] that providing generic advice doesn't work for startups. Every company is unique and they have unique challenges. Instead, Sam should be focusing on bringing stories of various startups in light, interview their founders and have a focused discourse on what worked and what didn't for that __particular__ startup.
[1] https://news.ycombinator.com/item?id=17309725