Every martial art has its highlight reel. Taekwondo has the spinning head kick that ends a man's evening. Boxing has the one clean shot where the other guy's legs file for divorce before he hits the canvas. Karate has the board, the yell, the whole pageant and some of the moves look genuinely cool. Show any of these to a seven-year-old and he stands up. He gets it instantly. He wants to be that.
Now show that same kid a jiu jitsu match. Two grown men in matching pajamas lie down on the floor and begin to slowly, thoughtfully hug, legs wide open. One is on his back. He appears to be losing in the way that a man being mugged is losing, except calmer. Nothing flies. Nobody leaves the ground, because the ground is the entire venue. For six minutes they breathe heavily into each other's collarbones and occasionally one shifts a knee two inches, and a man at the side table whispers that this was, in fact, devastating. You don't understand a thing about what's going on. The kid has already wandered off to watch literally anything else.
This is the only combat sport where the announcer has to keep explaining that the guy flat on his back, being sat on, is winning. Where the dominant positions are named like furniture and yoga. Where "full guard" means the bottom guy has wrapped his legs around the top guy in what any honest observer would call a hostage situation that both parties seem fine with. It turns out the bottom guy is winning after all!
And here is the part that ruins the fun... Sadly, jiu jitsu works. It sadly, completely works. The guy with the beautiful flying kick gets caught once, taken down, and folded into the mat by the man who looked like he was napping, and he does not get back up until he is allowed to. The least watchable thing two people can do to each other is also the thing that actually ends the fight. The seven-year-old wanted a hero. It got a reality check. This martial art works. It sucks to see, but it does work...