That said, there's a huge difference between wanting to be a creator, and actually creating stuff. In my experience, most young people quickly settle down into caring less about the acts of creation and self-expression, and focus more on 'making an impression' in their immediate peers. This path leads to obvious, uninteresting, facile, lazy, short-term, me-too, style-over-substance, meaningless creations that I can barely label as such.
Is it down to proper encouragement and guidance? For sure that must help a lot, especially when dealing with setbacks and lack of validation. But I believe there needs to be a level of inner dialogue and disregard for what's popular around oneself, that is a) at odds with the desire for teens to 'fit', b) rarely encouraged in practice in our society, and c) hard to sustain against the amount of noise (media, fashion, etc) we surround ourselves with.