People with a handful of hours towards a private pilot's license have no (zero, zip, nada) expertise or insight when it comes to the design and manufacture of commercial airliners. You might feel like you do, but it has no basis in fact, because the constraints that really matter are things that engineers have spent a hundred years working out by trial and error (and crashing a lot of aircraft).

We wouldn't take airliner design advice today from the Wright brothers, either.