The previous article in the series (linked at the top of the article) discusses this. The author discusses the track record and suggests that while the system i

The previous article in the series (linked at the top of the article) discusses this. The author discusses the track record and suggests that while the system is not proven yet, there is a good chance it will succeed. SpaceX has a good track record of success with their rockets and with this project in particular. They seem to have the skills and backing to make it work, and they aren't discouraged by setbacks. Of course it is not guaranteed to succeed, but it seemed clear to me that the point of this article was to explore what could be done with starship if it does succeed.