its one of many octodome kids activities that isn’t technically allowed, but it is almost a form of training, and if the people in power tried to shut it down it’d probably just pop back up again
a big difference is that because it doesn’t have much money or regulation behind it, stages are set up literally wherever theres unused ground. there are some stages that were built by some passionate kids to be perfect battle stages, and there are some stages that were hastily created out of just. whatever. theres probably a popular nearly vertical stage that scales up some abandoned scaffolding.
also i think octarians get really intense about it. they bring the intensity of war to their games without even realising it, its just kind of an instinct-