"Out of curiosity, can you describe what sort of 'deep wisdom' you think isn't/cannot be passed along?"
I assume you mean, "cannot be passed along Facebook, or other Internet-like communications network".
Mindfulness is one example. It's difficult to convey over the internet, and still challenging in person. It's the kind of skill that requires someone present to point out when you're being mindful and when you become distracted. You can't force someone else to be mindful. Hell, you can't force yourself to be mindful. Many stories disguise lessons of mindfulness.
Fear and dealing with fear is the biggest example. All fear roots back to existential fear. Some (not all) older people have a peculiar attitude because they see their own demise coming, accept it, and live on. The TV show, Breaking Bad is a great example, a man who saw the end of his existence, stripped away all the BS and decided to leave behind a legacy.
However, it's one thing to watch characters on the screen deal with fear, and quite another to deal with your own. The mind plays many tricks to comfortably avoid fear. Another person in the same room witnessing your discomfort has significant impact; if they are able to mindfully witness and convey a sense of safety, such interaction helps you gain insight about your fear, and possibly change habits and actions resulting from that.
"The pace at which technological change is happening has certainly increased since the industrial revolution, and I presume that has been a major driver of cultural change as well."
Though off-topic, you might find this interesting: http://www.ribbonfarm.com/2011/06/08/a-brief-history-of-the-...
Venkat's blog post led me to a book, Lever of Riches ... which I think has a lot of useful insights yet seriously flawed. But, it is interesting as a survey of technological history and look at changes within culture as well. I did not know, for example, that clockwork mechanisms reached high art before the invention of moveable type. These clockwork mechanisms directly paved the way for industrialization, and accounts for the obsession some cultures have for gadgets and gadget making.
I've also asked this series of questions on Quora. Perhaps you might have some insights:
"How has the invention of moveable type accelerated the tempo of invention and innovation?" ( http://www.quora.com/How-has-the-invention-of-moveable-type-... )
"How has Open Source accelerated the tempo of software innovation?" ( http://www.quora.com/How-has-Open-Source-accelerated-the-tem... )
"How has Github accelerated the tempo of software innovation?" ( http://www.quora.com/How-has-Github-accelerated-the-tempo-of... )
"How does the tempo of innovation within Github differ from that of a geographic technology hub such as Silicon Valley?" ( http://www.quora.com/How-does-the-tempo-of-innovation-within... )
"In fact what do you think of most western countries where population is actually getting older and there is a lack of young people?"
I have not studied up on Western cultures as much as I did American and East Asian cultures. I'll think about this.
As a distraction, I offer this story. Japan has a cultural value in which the elders (now mostly from the WWII generation) believe that they can and should sacrifice themselves for the future generation, the children. It's a sort of a, strange mix of bushi and Confucian values. Another interesting thing: the Japanese Shinto values of spirit ex machina leads to a great obsession with robots and androids ... and exoskeletons to help the rice farmers continue growing rice. Because many of the younger generation do not want to farm. There's big problems with social recluses.
Yet, I have also read reports of the attitudes of the generation just now entering ... post-high school. Unlike their older siblings (about half a generation older), they ... don't quite outright reject their boomer parents workoholic attitude, yet don't seem to run and hide away in a closet. I look forward to the stories coming out of this generation. Maybe I'm wrong about "rites of passage conducted by clueless peers" after all.