Of course we are talking about Webtoons so everything is more exaggerated, but I believe that in the case of Korea, the Chaebol heirs of large conglomerates are responsible for a large part of the influence on the country's economy, so there is a certain concern in maintaining the "appearances" and also many marriages are practically business mergers.
But in real life we can see the examples of Princess Diana who generated a lot of controversy in the 90's and now her son, Prince Harry, who gave up the throne as well.