I saw La Cucina at the Hollywood Film Festival and it's a great little movie that doesn't try to be something it's not. This film is a slice of life about the conversations and contradictions that make us who we are, and real-life conversations don't fit into perfect packages or tidy summaries like a high school philosophy paper.
We all have contradictory thoughts/opinions/answers depending on how questions are framed. And I'm sure we've all had long conversations in the kitchen that help us figure out what we think and believe, without actually solving anything (no matter how much we think we've solved the world's problems after a few bottles of wine.)
More importantly, many of us are great at giving advice to other people, but lousy at applying that advice to ourselves.
More than simply an "odd moment" or scene transition, I thought the resident musician was a nice contrast to the complicated relationships unfolding in the neighboring apartments. He was like a non-verbal Greek Chorus, and a subtle reminder that maybe we should all stop talking so much about what we WISH WE WERE DOING and actually START DOING the things we love to do.