Drivers liscence exam is not enough

Imagine 2 roads are crossing at a certain point and you decide to walk across to one of this roads.After waiting a little while,traffic light turns to green for pedestarians which means its just right time to cross the road,but...You realize that cars on the other way are moving towards to you.Green light means you are allowed to cross the road however it doesnt ensure your life.Crasy drivers have already forgotten important traffic rules so they never yield the right of way.They have to yield right of way to the pedesterians when they change their direction at the corners even if the traffic light is green as a grass..I wonder how it is possible to forget this rule as a driver at the same time with other drivers..How a collective ignorance is this?..