Honestly, you should go back and look at the aircraft design of the 1940’s, and then look at the aircraft designs being certified today, and rethink your position. A DC-3 is nothing like a 787.
An Ercoupe is nothing like an SR-22.
Today’s aircraft are vastly more capable, efficient, and safe than those of the 1940’s. The FAA has enabled and supported innovation every step of the way, and also been the straight man looking out for public safety and holding industry’s feet to the fire there.
And I say that as someone who has spent my career in industry, developing new aviation products and technologies.