Snowballing is kinda a shitty thing to revolve the game around
Like, maybe if everyone is snowballing, but it's just one guy 1shotting a bunch of people who can't do shit unless he lags out or something until the nexus falls
and by the time he falls off the enemy adc who was sitting around getting free assists all game is now a full build vayne and she will effectively just 1shot you until your nexus falls
comebacks seem super rare now
seriously though someone could play the dumbest shit ever like
and just hard stomp people by sheer weight of numbers if they get the snowball going, and there's one every game