Earlier quoted context omitted.
Obviously, not all South Koreans are locking themselves up. This is just an unusual hotel that helps people get away from everyday life and stop being tied to their smartphones for a while. You could remove all references to South Korea, and the business model still looks interesting. I suspect it could work just as well in Japan, or even in the West as a modern alternative to a monastery.
Why not just go to a monastery? It's just as structured, but with better food, scenery and the meditation/prayer/spirituality element helps when you return to civilisation.
Edit: Most Koreans would think of monasteries as a Western/Christian thing. Culturally, modern South Korea is much closer to the West than to India or even China.