Prior to the catastrophic tsunami, the Indian Ocean was not considered at high risk for an earthquake generated tsunami.
I certainly agree that the risk was low. Still, low risk is not no risk.
I don't think it was too much to expect that the Indian Ocean nations would have augmented their weather tracking and early warning systems for monsoons and other tropical storms that hit their coasts with a similar warning system for a seismic event.
Perhaps it would not have changed the result even if they had. But it frosts me that we in the United States plan for it and other nations, for whatever reason, are not expected to.