Especially when you don’t notice the light has changed, someone honks at you, and now you have half a second to reacquaint yourself with what’s going on in front of you before stepping on the gas. I see many drivers looking down (presumably at their phone) at a red light who get honked at and almost immediately take off without any safety checks. If, say, a child had run out in front of the car, that child would get run over.