Game should end at two/three inhibs down

Not sure why super minions are so powerful, they literally end the game. I feel that when one inhib is down its a decent penalty to incur on the losing side. However when two are down, the game might as well be over. I know statistically there is always a chance. But, why is there so little chance? I kind of would rather the game be over at that point. Should a team really be allowed three waves of super minions? There is no point to the game at that point. Its nice when you have them on your own team. But trying to deal with them I feel like I have a lack of options. Maybe zzrot and banner should have home base buffs? Thoughts. At the same time i can see someone saying if you were outplayed to the point that you lost two inhibs you should lose the game, but I think that is also sort of my point.