(*I don't necessarily mean the practice of shooting a rocket into space and launching a telescope, but the ability to build an object that can perform that exactly to its specifications under those kinds of circumstances.)
IMO, Webb is a bad example. It was super over budget, late, and experienced a litany of problems.
In contrast, most un-manned NASA projects are roughly on budget and generally have few issues. And even the ones that do, NASA often figures out how to correct them like the Hubble telescope.
This is simply not true. Maybe for some of the smallest Discovery or New Frontiers missions, but then those aren’t actually built by NASA/JPL.
Mars Sample Return is also famously insanely late and over budget, and so have been most flagship missions.
JWST was built by primarily Northrop Grumman engineers
Give other space agencies the budget of NASA, let experience marinate and you will see similar performance. NASA does not have some sort of magical intrinsic property that makes engineers perform better by sheer effect of working under its umbrella.
Nasa, congrats on successful mission, which now ended.
I see what you did there.