Re-Heat,
You may have a point.....
Remember the static test on the A380 wing that broke at something like 148% of design load, rather than 150%?
Maybe, sometimes you would like to have that little bit of extra margin, because they did not mill out every single "superfluous" ounce...
Might be worth discussing, although it's more academic than anything else.
Accidents due to this kind of extremely rare combinations of circumstances still happen, agreed.
But as long as third-world airlines dump badly maintained aircraft in atrocious circumstances with a frightening regularity.... I think our priorities are elsewhere.