The real reason why he has already endured what Presidents Moon Jae-in and Park Geun-hye went through

In reality, he has endured everything that President Moon Jae-in and President Park Geun-hye went through. To be honest, when President Moon Jae-in and President Park Geun-hye appeared on TV news, they probably experienced about 30 people glaring at them collectively.
So, when a President goes through that kind of experience, I saw their facial expressions distort severely. Even for a President, it is hard to control one's expression.
If you experience that, you can tell just by looking at their face.
That is proof that he has already endured it all.^^
To all the women from Busan I've met... honestly, if your boyfriends ever experienced this, they would all leave you. The person he has met once has more patience than the boyfriend you are currently dating. While you are enjoying a comfortable relationship, he is enduring all of that behind the scenes. His patience is currently ranked number one in the country.
That is why, even though he is young, his level of maturity is already that of someone in their 50s or 60s.