[marcelluspye]

Not the OP, but here's my observation: When I have to stop at a light until it turns green, I have to navigate the intersection while the cars around me are entering it as well. Suddenly there's a car trying to pass me, a car in the oncoming lane turning left, etc. If I can skirt through the intersection while the light is red and there's no transverse traffic, I can get through without interacting with any other moving vehicles.

I've also been involved in car(-car, not car-bike) accidents before where some idiot at a light was looking at their phone while stopped, and did something stupid when they noticed others moving in their peripheral vision. Plausibly, such idiots could be the cause of a lot of accidents at intersections.