When the world didn't change as quickly, or didn't change at all, the elders truly knew everything the young ones knew, and so much more. They had truly seen everything and had plenty of experience with the problems young people were struggling with.
This very much isn't the case any more. I'm in my twenties (technically part of gen Z), but I already feel like I don't understand the Tiktok-using, trap-loving part of my generation. The 14-18 year olds probably have very different issues now than I did at that age, and that wasn't even so long ago. People from my parents' generation are out of the loop completely, their world still revolves around linear TV, college as a path for success in life etc.