And how do we know that the only people to be killed will be town? In a game of this size we likely have more than one team of mafia, which means mafia can kill mafia, same goes for SK. Beyond that, we have doctors, role blocks, vigilantes, and cops (though obviously cops can't kill scum directly or save someone directly). There is probably abou the same chance of scum dying on the night as there is Treann to be scum.