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 remember a scandal in Germany some years back, where it was reported that people on the airline call centres were instructed to wrongly tell customers that they weren’t entitled to compensation, and to only pay out when they where under threat of being sued. Dunno whether that improved.