I don't know you personally, so I'm not interested in what you personally find useful about what you know. If I'm interested in anything you know, it's only in those things that are recognized to be useful to other people in the society we both live in: medicine, law, art, agriculture, engineering, science, etc. If you find someone else personally enriching for you, that's great and I'm happy for you, but it's got nothing to do with anyone who doesn't know you personally.