The particular phrasing that gets thrown around is extremely cultish in English (dear leader, glorious leader, supreme leader, etc.) which is why westerners keep repeating it. It doesn’t come off as a term of endearment, more like subservience. I dunno what Koreans say in Korean and whether it carries the same connotations though (probably not).
Yeah that makes sense. In my political science classes when Authoritarian governments are brought up the term “supreme leader” is used a lot so maybe I’m used to it. Then again it very well might be a language barrier with tonal contexts (how they say it). I can’t recall a time when a Western leader was ever referred to as “supreme leader”…