Jesus was Jewish to his bones. The things he said or did would make none sense if you were to pry him away from the religion he professed and practiced. Being incarnate means being historical. The contours of human history are shaped by relationship. Jesus was not some esoteric spiritual guru. He was religious faith, hope, and love made flesh.
"I'm spiritual but not religious," empties the incarnation of its sacramental content, of its historical grist, and of its spiritual hope. Severing spiritual enlightenment from religious relationship renounces the sacred character of the world and the salvation God desires for it.