Well, obviously there is no point for you.
Korean barbecues are like that and they are super-popular among Koreans and expats who enjoy multicultural experiences (and meat).
You get to cook the meat exactly the way you want it and prepare your plate exactly the way you want it. Do you enjoy fajitas? Technically, you need to assemble your own. Galbi and ssamgyapsal are like that, too. You decide what you want. A lot of meat? A little meat? A lot of sauce? No sauce? Do you want the garlic and pepper cooked or raw? Do you want to leave it out? Do you want to grill the kimchi or not? Do you want to grill the kimchi above the meat, so it flavors the meat, or below the meat so it is flavored by the meat.
It's a social event. If the only reason that you go out is that you're feeling lazy and don't want to do any work, then obviously you wouldn't go out for Korean barbecue. But if you like to go out to have fun with your friends and eat delicious food, then why not?