No it's not, RENURPP. It's the end result of years of politics following the Hamilton Is crash all those years ago. You the one: where the post-mortem on the pilot found a tiny trace of cannabis as well as a blood alcohol reading of 0.2 (or something ridiculously high).
Despite the autopsy stating that the BAC reading could not be relied so since the body produces alcohol post-mortem, the pollies all started screaming for blood. Gotta be seen to be doing something!
That is why we have what we have today.
Nevermind the fact that fatigue is a potentially bigger killer and that it hasn't been properly regulated since about 1950.... Show me anywhere in CAO's where it talks about ultra longhaul flights across 10 timezones, just as one example!