Putting half of the aircraft in tornado alley isn’t quite as stupid as porting all of the Atlantic aircraft carriers in one spot.
The smart deployment would be one at Offutt, one at Barksdale, one at Andrews, and one in the west.
They have always had two there, for many years. This is the first time they have been hit by a tornado. The tornados came in no notice and there was not time to move the aircraft. The bulk of the damage was outside and west of the base.