These are chicken titties right?

Looks like you chopped it on the grill without letting it rest after it was done cooking.

No rest = no juice

Space and heat.

It's hard to cook 10 burgers on a stovetop, especially without anywhere for the grease to go. You can cook 3 patties max before it's being boiled in grease on a pan.

It's hard for typical cookware to get to and maintain 500f like this griddle can. Only way to get perfect sealed sears on meats is high heats.

Not just fire, outside fire. This is also why hardcore charcoal fans look down on propane: it’s too much like a stove

You also tend to cook differently: more sear, Maybe pick up some flavors from smoke! And it’s nice that any smoke is outside. Actually I’ve lately been doing more “baking” on the grill, most recently a pan of Mac and cheese.

Because fire is the Devil's only friend.

Man has been squatting in the dirt and burning food for millennia. We are just too civilized to squat anymore. Besides, it tastes good.