In these specific matchups, life gain can be quite potent
Finishers/ Surprise /Alternate win conditions Sometimes you reach a point in the game where you need just a finishing move to claim victory, other times you keep a low profile only to set up a big surprise that will devastate your opponents and some rare times you can steal the victory by just doing something out of the ordinary
Chances are not every opponent will be running mono-red goblins, so well want options to mitigate the effects of those noncreature permanents
It doesn't sound like a lot, especially when you have cards like Keeper of the Accord, which can do similar things every turn, but consider this: the land doesn't have to be a basic Plains, and it doesn't have to enter tapped
Best Commander of All Time is not one of those titles, because although this is Magic's best battlecruiser, this version of Emrakul has been banished from Commander since 2010