Your statement, "Where does it say anywhere that amateur radio has to be relevant to exist?" I wasn't implying amateur radio needs to be relevant. What I was trying to state is a basic of Marketing, that is, what would make this hobby interesting, attractive to a specific consumer segment? Given this information we can then better promote the hobby to a given market segment. All hams came to the hobby with some belief in its relevance to ourselves - that which makes it meaningful to us individually. If we investigated this for the 12-20 year-old, would we then find a better way to approach and recruit this demographic?