Rereading what they said, the preformed group still have to deal with snipers.
You know how there are people that pull S-ranks early for no other reason to be an ass, before even the spawners get to it?
Yeah, I can see people doing that just for a laugh. Stocking up on ciphers and trying to get in if they end up in an instance with a premade. Easier to leave and try again, but you still have to wait around for the weather.