I think Bergerie 1 is right.
At the dawn of my career I flew with lots of old ex WWII B707 Cpts who just did it and did it extremely well. Nav aids were primitive, an NDB was considered good and a twin locator approach a thing of great joy. The odd ILS was just that, an odd one.
Watching an old pro fly a twin loc into, say, CCU Dum Dum in the monsoon with pi$$ poor vis and make it safe was worthy of great respect, yet that's what we did - no fuss and fanfare, just do the job safely. Remember that the automatics on the B707 were real primitive, no help there.
Those fellows were, in the main, great pilots and they just got on with the job.