"Safety" is a state of mind. Any CASA butt scratcher can blather on about "safety" and be impossible to contradict.
What is better, but harder, is to implement full blown risk management using an actuarial approach. If that is done, most of CASA and its regulations get swept away.
To put that another way: When someone says "you cannot put a price on human lives". they are talking bullshyte. Insurers, via actuaries, do this very calculation multiple times each day.