"Your cheap plane and bus tickets weren't enough to improve their lives and prospects here were they. And many of those people couldn't even afford your cheap ticket and the opportunity to bum around that you were able to experience. People won't miss what they couldn't have in the first place"
That, lamentably, is true. Many people lacked the ambition to 'Look outside what they knew'. They accepted their lives, living small lives under limited circumstances. FTR, boat-train tickets weren't that expensive; you just needed to want to do it, I guess.
Plane tickets?? Are you for real? 1978? God, no! Utterly unaffordable. Unlike the £30 Ryanair were charging all through the 2000s to fly you to Berlin 😉
And I certainly didn't 'bum around', I chambermaided, including hosing down the men's' urinals after 'a big night'. 😂 (now!).
Having never experienced the highs and lows, the hard work (and the easy work) - and the bloody good times we had working 😉 in Europe as late teenagers, yourself, I take umbrage at the idea we were 'bumming around'.
What we learned was that there were different ways of being (that didn't involve accepting the norms- and, apparently, poverty, if you say so- of our parents generation).
I'm sorry if you saw that as your immutable lot, but I'm frankly astonished that you haven't moved on from that mindset.
But maybe nostalgia plays a part?....