You are responsible for where you choose to run your workloads. AWS will give you Availability Zones. They will give you Regions. They will even give you cross-region replication. What they will not give you is a missile defense system. That's not in the pricing calculator.
Multi-AZ is designed to survive a power failure or a network partition. It is not designed to survive a geopolitical crisis. These are not the same failure mode.
Corey Quinn (da LinkedIn via The Pragmatic Engineer)