The Korean government explicitly chooses companies for these things. And those companies, Chaebols like Samsung, choose the laws.
If these Korean apps were so good, you would expect them to penetrate foreign markets. But they don't.
https://www.techdirt.com/2023/12/06/dumb-telecom-industry-ba...
Just like how British car companies collapsed when foreign competition entered the market on equal footing, these companies will disintegrate if forced to compete.
https://www.latimes.com/world/la-xpm-2010-dec-01-la-fg-south...