For some people, that might be fine. If you don't have plans for how to rapidly move out of EC2, you might as well just sleep through an all-of-EC2-goes-down outage for all you can do about it.
You should at least know there is an outage to have something to tell your downstream customers. It is really embarrassing to have a customer (or your boss) call to report an outage you don't yet know about, even if there is fuck all you can do to resolve it. Basic principle of ops.
