Yes, good design is an old phenomenon - such is the nature of technology. But the article didn't make the claim that design started after WW2 - just that the importance of the designer / user relationship became better coded in the language of industry which followed the post-war period.
We had generational shifts in UI design pre-war. But we didn't have computers, which have manifested every design flaw ever, and still are pretty crap to use.
The point of this article is not to make boisterous claims about contemporary design - but to point out that the user / designer relationship is still more relevant than ever. Also, people are still crashing planes, metaphorically in their user interface designs. The age of dark patterns is upon us.
The B17 crashed because of dark patterns.
"He saw, instead, the impossibility of flying these planes at all." Really! B-17's completed hundreds of thousands of missions.
And pilots still land modern planes "wheels up", so modern UI design has not eliminated the problem.
And presumably every one of those dials corresponds to something important the pilot has to be monitoring and controlling.
There aren't many vehicles with an interface that complex.
Also, you can halve the count in most cockpits, as they'll be redundancy duplicates or co-pilot duplicates. Cognitive load during flight is pretty low, too, so plenty of time to keep an eye on things. Landings and take offs are prepared for with plenty of time ahead (at least they should be) so again, plenty of time to check and configure.
Numeric displays require a lot more conscious effort to read a number, decode it , decide if it is an acceptable value. This is why the steam gauge style remains popular, even if it is a digital render now.
When riding horses with two sets of reins, they have a tactile distinction, so one can sort them out without having to visually check which reins go where.
https://en.wikipedia.org/wiki/Turk%27s_head_knot says "A notable practical use for the Turk's head is to mark the "king spoke" of a ship's wheel; when this spoke is upright the rudder is in a central position." and presumably a helmsman could be steering in the dark in inclement weather and still feel it.
The concept of "user friendliness" dates back a lot longer in ww2. During the industrial revolution industry went on a binge of making things more "user friendly" because it reduced human error and reduced downtime spent fixing machines and hosing former workers out of them. This is why, for example, on a lathe you traditionally have different shaped Z and X handles. It prevents you from crashing the machine by having your hand on the wrong handle when you go to make a rough adjustment.
A bored journalist could write the same article about user friendliness in the early industrial workplace, it would just be harder because there's no one big story to base your article around and the sources are harder to find.