what? Aviation safety is not designed to get safer through lessons? They literally try to ensure it is 100% safe out of the gate. The accidents that happen are usually statistical outliers and lead to loss of life.

That's what it means when they say aviation regulations are written in blood. Not that they just fling planes into the sky and be like "boy i hope we learn some new regulations from this". The number of airplane crashes would be astronomically larger if the 100% safety part was not embedded into the design process.