I know the point you are making here, by attempting to carefully skirt around it.The first powered human flight at Kitty Hawk (three hundred feet on a fabric-covered wooden kite w/12 horsepower gasoline motor) to men going 25,000 miles per hour to the Moon and back---and walking around on it while they were there---took 66 years.
From that day until now has been almost as long: 55 years
The laws of physics didn't change in those 55 years, mathematics didn't change, the properties of metals and chemical elements didn't change, the principles of education didn't change, and human DNA didn't change.
The only variable that COULD have changed was what's considered acceptable educational (pre-job) performance, and on-the-job performance after the fact.
Put another way, getting work done RIGHT became secondary to other considerations.
Whether or not those responsible truly understood that the Natural World is inviolately rigid, has no feelings, and is not subjective is a good question.
That historically significant, world-class companies once capable of engineering magic can be destroyed by employees who either didn't understand that, or didn't care, was never in doubt.
Which makes the essential question: How did they get in?
You are of the opinion that in the halcyon days of the first half of the 20th century, the pioneers of aviation and space flight were men's men with balls of steel, who clutched a bald Eagle in one hand, a copy of the King James Bible in the other, and chomped on a cigar, whilst launching into the air on either a bicycle with wings, or a phallic shaped rocket carrying tonnes of explosive material.
What, you would like to believe has gone wrong with companies like Boeing, is that their workforce is made up of 'nancy boys' like Joe, who wants to be called Josephine. Joe fits window seals, but doesn't do it properly because he fears breaking a nail. Or lesbian metal worker Hilary, who loves animals and eating tofu. She once had a bad day machining door pillars, because she was angry at the lack of vegan options on the staff canteen menu.
In truth, it's nonsense. You seem to think the aviation has been stagnant or gone backwards in the last 55 years. In fact, modern employees, who have 'feelings' have made the aviation industry the safest form of mass travel. Safety records have improved every decade since the 1950's. In 1969 air travel was for the privileged few. Now, in the developed world its available to almost everyone.
Customers today have high standards, and rightfully so. I do think in part a media frenzy is gunning for Boeing, but they don't help themselves, and have serious issues.
Comparing to Airbus, Boeing are being outperformed by a company that is largely government owned, where employees have far greater rights around their working contract, more rights around discipline and firing, decent paid annual leave, statutory sick pay, paid paternity leave, longer maternity leave. Also, stronger unions and work councils enshrined in law, where employees can raise concerns with senior management.
This is what thinking about people's feelings looks like in a work environment, and it appears to be successful.
Boeing, has spent vast sums of money lobbying government to reduce safety regulations and red tape for a competitive advantage, and its worryingly cosy relationship with the regulators is the result. Bean counters sought these changes to line the pockets of shareholders.
If you think a return to the spirit of those tough grizzled aviation pioneers, for whom education was the experience of the school of hard knocks, or a back handed slap to the chops, is going to improve Boeings fortunes then think again!