But my point here actually was the difference between "at least x times stronger than it needs to be", and "exactly x times stronger than it needs to be". Usually things are manufactured to the first spec, rockets are much closer to the latter spec because keeping weight down is so important.
I suppose airplanes must also be closer to the latter spec than most things, but they should still be more forgiving than rockets.
But my point here actually was the difference between "at least x times stronger than it needs to be", and "exactly x times stronger than it needs to be". Usually things are manufactured to the first spec, rockets are much closer to the latter spec because keeping weight down is so important.
I suppose airplanes must also be closer to the latter spec than most things, but they should still be more forgiving than rockets.