Do you think that storing our knowledge via external means (paper, computers, DVDs, etc.) is as effective as passing it from one person to another?

To be clear, I’m referring not to the storage of stories or history, but to the passage of skills. I’ll continue on my train today I as a guitarist, can learn lots of things from the internet, but at some point I needed a human teacher to guide me. This seems to be true of most things, or advanced schools would be unnecessary. There are things that a book or even an advanced computer with video and everything just can’t seem to convey. What are your thoughts?