Yeah, yeah, you are right. I AM going to start off by saying how philosophers talk of things that, on the face of it, seem insane. I mean, if you come across someone laughing, when something very distressing has happened to him, your first instinct is to say, "There, there, get a hold of yourself" and wave in a paramedic with a sedative injection, if not a straitjacket.
Too late for Tiru who is not around for your kindly ministrations. Here he goes...
Idukkan varungaal naguga adhanai aduththoorvadhu aqdhoppa dil - Tirukkural
Smile in the face of distress; there's no more powerful weapon against trouble - Loose Translation
So there. When you are faced with distress, laughing at it is the most powerful weapon against it, according to Tiru. It's probably not as insane as it sounds. In fact, it seems like the sort of thing you pay good money to a psychologist to hear.
Think for a sec. What happens when you are faced with any sort of hardship? You may grieve or feel hopeless or become depressed. AND...as a consequence of those overwhelming feelings, you give up on living. As in, you give up on actively engaging with the world, working to set things right. The melancholy of distress freezes you into a stasis where you get frozen into that moment - of loss or defeat or pain - without the energy to move on. Which ensures that the distress defines you going forth.
To be able to laugh at it...that probably is hyperbole. Of course, if you CAN you make the entire problem much smaller and, thus, you find that you have the ability to deal with it with relative ease. You know, that things about holding a stone close to your eyes and seeing it as a mountain vs holding it away and seeing it for the stone that it really is. What's the word? Mmmm...Ah...Perspective! Distance yields perspective. AND to hold onto the pain ensures that you cannot distance yourself enough from the problem to see it in perspective.
Even if the hurt is too high for you to laugh at it, it's better if you can avoid any distress from overwhelming you. To be able to look on a thing rationally instead of letting emotions overwhelm you...THAT's the best way to deal with distress. Once you steady your mind, you'll find that the distress becomes manageable and will eventually disappear.
If you, indeed, have the ability to see the funny side of things, to be able to find truly something to laugh at, THEN indeed are you equipped with the most powerful of weapons against all distress. Though, yeah, you may also invite that sedative or straitjacket!