Well said...you parrot the party line beautifully. But......between the 70's and now Southwest, Easyjet and Ryanair have put 1000 ish jets in the sky, carried zillions of people and created scores of 000's of jobs while your "legacy" world view slowly strangled other airlines with the "We've always done it this way" ideas.
Let's have this discussion again in a few years when the dinosaur 744 fleet has weathered a few years of Open Skies on the Pacific.
You too will learn from history.....practically everything in aviation has been done before