The point is that the diner gets to see the chicken they will eat and understand the process.
The efficient way described in the blog is to instead use a stunt chicken which'll be paraded around the dining room instead of being cooked.
That's not a process improvement when the entire point of the dish is to show the diners what they will eat before they eat it and flex the restaurant's ability to coordinate.
Purposeful inefficiency is beautiful when it's about retro video game console programming or mechanical watches, because that's about spotlighting the process. Both of these are inefficient---modern computers are more powerful and quartz watch keep time better---but are fascinating because the difficulty of programming in assembly or an intricate series of tiny gears have inherent value to some people, far beyond the result of a video game or getting the current time.
It's a complicated finely tuned process to get a chicken from your table to the kitchen and back again. The chef wants employees that value the process itself, which is a fair ask when the process is the product.