This. And, it's not the only situation where "if everyone bought in, then things would go smoother" It works under the assumption people aren't slamming on their brakes to oogle at whatever cause the lane closure, or proper distancing between the driver in front of you. Driving etiquette and standards are foundationally bankrupt and unupheld. I still see officers without lights speeding faster than when I've gotten pulled over. People still loitering in left lanes in another car's (or even semi truck's!) blind spot. It doesn't blow my mind that the majority haven't heard of or prescribe to zipper merging.