While that sounds easy what if swerving off course definitely saves one live, but might cause one death with 60% probability? What if it definitely will save 3

While that sounds easy what if swerving off course definitely saves one live, but might cause one death with 60% probability? What if it definitely will save 3 lives, and might cause one death with 10% probability? Do you see the problem with absolute rules? Human morality is quite complex and not so easy to model with simple rules.