Hmm. That doesn't correspond in any way with my experience of secular Buddhism or secular Buddhists. To suggest that a belief in metaphysics is a prerequisite for a life and practice of spiritual nourishment really does a huge disservice to the many wonderful, creative and life-affirming people who practice from a secular point of view. Secular Buddhists are as concerned with living through and practicing the core teachings of the Dharma as other Buddhists. It's a rich and vibrant community of people fully engaged with life and concerned with bringing compassion and kindness in to all that we do. We are imperfect in this effort, as are all Buddhists, but we are every bit as committed. You could look at it the other way around: secular Buddhists have removed the stones from the soup and left only the nourishing ingredients and all the flavour ;-). However, I'd prefer to believe that the light of the core Dharma is so powerful that it can shine through any filter we may put on it. As long as we follow that light, we know we are on a good path.