The seats are assigned. People have been standing in line for 15 minutes now. Why on earth would anyone want to stand there, when they could just sit and wait until the line clears?
I understand wanting to get off a plane ASAP, but boarding? You just end up sitting on the plane, waiting for everyone else to get on.
I didn’t used too get in line. But I’ve had a number of times someone took to much carry on (how I don’t know) and took all of the overhead space, refused to fix it, and the airline didn’t give a fuck either.