One of the most endearing qualities of Jin and V is their ability to laugh at themselves. They're not afraid to make fun of their own mistakes, and that's something we can all learn from. By poking fun at ourselves, we can diffuse tension and show others that we're human, just like them.
For example, imagine you're at work, and you make a silly mistake, like sentencing an email to the wrong person. Instead of getting defensive or trying to cover it up, you could just laugh it off and say, "oh well, I'm an idiot, what can I say?" It's a great way to break the ice and show others that you're not too proud to laugh at yourself.
He's an idiot! ミーム ジェネレーター
And that's the thing, we're all idiots sometimes. We all make mistakes, and we all have those duh moments where we wonder how we could be so stupid. But instead of beating ourselves up over it, we should just shrug it off and move on.