Climbing started as part of territory disputes and non-military shows of national bravado. There’s been a repeated surge after wars wrap up- perhaps a stand-in trial for young men to prove themselves after the trial of combat ends.
Many bold & great climbers of history were young men of no fame from poor countries. There weren’t that many wealthy dukes just looking for a way to pass the time.
> There’s been a repeated surge after wars wrap up
What are you referring to? The Second World War seems like the obvious case. I think there were two things at play there. European climbers returned to the Himalayas, and resumed where they left off in 1939; perhaps the war delayed the ascent of Everest instead of causing it. Also, nylon! Ropes that don't break—and that don't break falling lead climbers—were a huge enabling technology for rock climbing.
Many bold & great climbers of history were young men of no fame from poor countries. There weren’t that many wealthy dukes just looking for a way to pass the time.