You're asking why it felt meaningful, but I think the more interesting question is whether the AI is actually interpreting your dreams at all, or if you're doing the real psychological work yourself the moment you read its output and go "yeah, that resonates." In my experience with meditation, the insight only lands when you do the work of sitting with it — the tool just provokes that process. The AI doesn't need a shadow to be useful; it just needs to be good enough at pattern-matching to hand you a mirror, and then your unconscious does the rest.