Those bullets together explain how they can avoid having a staging environment.

There's a whole section of the article entitled "What’s wrong with staging environments?" that explains why they don't want staging.

They even presented their "why" before going into their "how." There is absolutely nothing weird about this.

Well, ok, it's weird that not all so-called "software engineers" follow this pattern of problem-solving. But that's not Squeaky's fault. They're showing us how to do it better.