Earlier quoted context omitted.
How so? Everyone running a light together is the expected behavior if you change the color of the light. In other words, it describes nothing that isn't occurring constantly everywhere. Where does the metaphor backfire?
The metaphor backfires because if everyone runs red lights they will collide with one another, as well as with those going through green lights.
In the same way that if everyone runs green lights, they'll collide with one another? How do you go through intersections?