The Western Zen? In my experience it is downgraded from being a religion to being a system of practice which relieves it of the broader Mahayana cosmology. But I would suggest the dogma is less obvious but still there, often just somewhere else, such as in its own limitations, or in a philosophical container at a higher level such as scientism.
All Zen is about releasing those attachments. Granted it's pretty hard, because if you succeed, you're enlightened.
East, West, Religion, Practice… From a Zen perspective, you're just troubling your mind with binaries and conflict.