They don't want the game to go into extra innings due to injury risk and not wanting to have to "hold players back" just in case. Nobody wants a tie. So, this is as good a way as any, I guess. I'm just glad the outcome is no longer tied to who gets home field in the World Series...that was a terrible attempt to "make the game matter".
Personally, I think ties should just end like the ending of Mony Python and The Holy Grail...but to each their own...
