Sometimes the fate of the world or the universe really does come down to a single die roll.
There's a philosophical argument to be had here. Should you let the fate of an entire game world be decided by something so random and fickle as the roll of a polyhedral lump of plastic (or other material, depending on how expensive your taste in dice runs).
The answer? Of course you should!
Obi-Wan: It's over Anakin. I have the high ground. And a readied action.
R2-D2: An elevated defensive position gives him +4 on attacks of opportunity if you jump near him. With his Force Attunement, there's no way you can avoid him hitting you.
R2-D2: Wait, was that a pun?
Padmé: There is one way to hit him first.
Padmé: Do a double forward Force Somersault with Force Jump and Vorpal Slice.
Anakin: Will that work?
GM: You'd need to be lucky. But if it works, Obi-Wan will be sliced in half.
Anakin: And if not?
Obi-Wan: I'll automatically disarm you.
Padmé: Trust me. It's how Obi-Wan defeated Darth Maul. And he was only woven rug level back then. It'll be a cinch for you.
Anakin: Let the fates decide.
R2-D2: Wait wait... You're going to let the entire fate of the Galaxy rest on a single die roll?
R2-D2: I have just the die for such an occasion.