At work we built something from a 2-page spec in 4 months. The competing team spent 8 months on architecture docs before writing code. We shipped. They pivoted three times and eventually disbanded.
Planning has diminishing returns. The first 20% of planning catches 80% of the problems. Everything after that is usually anxiety dressed up as rigor.
The article's right about one thing: doing it badly still counts. Most of what I know came from shipping something embarrassing, then fixing it.