Russian roulette has a probability of certain death.
17% of the time, you die 100% of the time?
No matter the efficiency advantages of doing otherwise, every penalty applied to a human should be applied by a human.
But, speeding is a crime in that by speeding you are needlessly endangering other people's lives. Laws are not necessarily what is moral and in some cases for need of practicality, laws must be preventative instead of reactionary. Not that I'm advocating the extent to which they go, but by your logic we should remove ALL airport security.