“Efficiency is the straightest road to Hell.” -James Howard Kunstler.
This is purely a priority vs. complexity vs. money problem. The customers demand cheap air travel, the airlines demand discounted airplanes, and the manufacturers set priorities according to time and money constraints where the actual projected costs of development and maintenance are externalized as far as the managers are concerned. They figure they’ll just get union concessions or price breaks from suppliers ‘down the road’ somewhere and fix it all ‘later’. This is where monetized thinking (true capitalism) doesn’t work UNLESS you monetize the passengers out of the safety loop.