Did you read the article?Yes. Any many similar over the years.
It was talking about setting up a mixing studio." Start by facing the short wall of your room" is a non-starter. Many ’mixing studios’ I worked in and my company wired had the desk facing the long wall.
SOP for an engineer who works in rooms from a London scoring stage to some artist’s ’mix room’ is to take your speakers (& amps, cables, level control for the truly twisted) along with some music you know and set up your speakers at the best location for that room.
The article is a crock for kiddies with a laptop.