EDIT: After reading the article, what Boeing did back then was the same thing as Boom coming up with a rendering and a high level design concept over the weekend. Also, back then times, and technology, were different.
This in contrast to the F-35 project which apparently decided all the capabilities up front and then has went about designing an aircraft to somehow reach all those goals. Whether or not it will is a subject of ongoing debate. It also somehow has wound up making 3 different airframes.
A good example of this would be Soviet copies of the B-29 & the V-2. In both cases there was pressure to "build our own that is better". Apparently Stalin got involved in both cases and demanded that a way be found to produce a domestic copy first, then learn from that, & produce a domestic design next. Not sure how accurate that is, but it seems to have worked out. Soviet long range bombers & Soviet missile systems are certainly nothing to scoff at.
https://de.hoffmann-speedster.com/media/image/e0/14/3f/Ferdi...