You are confusing the concepts, and applying the 11 nines to the wrong problem.

Durability is about: "If I successfully store an object in S3, how unlikely is S3 to permanently lose that object because of storage failures?"

It does not answer: "Will I be able to access that object, after a rain of Shahab-1 or Shahab-2 burn all data centers in the 3 availability regions across which my S3 bucket is spread out..."