Probably the most obvious lesson (missed by piliaks,skulls and governments) is that you cannot legislate safety.
Obviously you don't understand. ICAO and now CASA have made safety compulsory.
Much in the same way as
Operators must have an
operations manual to conduct
operations,
safe operations must have a
safety management manual to be
safe according to the Civil Aviation
Safety authority.
If you fail to understand this, comrade, you will be sent to Siberia for re-education.
...oh hang on... you're already in Tropical Siberia...