Crashes have been discussed to death on AE, they are simply not viable as a random event as systems tend to put more pressure on one than another, for example:
Airline A: Mediocre maintenance, large fleet of old 733s (60)
Airline B: ablysmal maintenance, small fleet of old 733s (10)
Which airline would loose the most aircraft with a non human decider? Most likely Airline A even though in a % theory, B should loose more.