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.
People are posting a lot of maybe more rational reasons, but I think there’s another answer that’s more in line with just being a human. Airports suck, air travel, generally, sucks and the whole process is riddle with both intentional and also just unavoidable misery. Every time a new step in the sequence of unpleasant and boring steps that is air travel nears, we start to anticipate it and get anxious to move on to that next step in the process. It doesn’t make it faster, it likely only makes the misery arguably worse, but some times people just can’t help trying to mentally hasten things even if in reality nothing is hastened at all.
These same people will all stand up at once the moment the plane stops… and continue to uncomfortably stand there for like twenty minutes.
On my last flight my gf sprung up and was irritated that I wasn’t doing the same. Like where the fuck you going to go? One foot to the left? Just, why? I’m chillin.
I stand up to stretch my muscles, mostly.
The seats are assigned, the baggage compartments are self-serve.
A long time ago most airlines checked at least one bag free. I used to always do this and as op suggests, not stand in line. It was great not having to take a bag through security and haul it around through airports and connecting flights, and avoid the stress of if the overhead space would run out.
But airlines have done everything in their power to make boarding and the whole flying process miserable in attempt to suck every dollar they can from you for their upgrades and priority boarding.
I do often take advantage of the airlines offer to “we expect a very full flight, overhead space is limited, and will check your bag for free to your final destination”