You're absolutely right. I have consciously blended Daoism and Zen. I have never been a member of a Daoist group. And all I have ever done is read Laozi and Zhuangzi. However, I had quite the mystical experience one day that lasted for more than two years. That came directly from reading Laozi. But, the only explanation I could find for what happened to me came straight out of Zen. Very perceptive on your part. Not too long ago I shifted back toward Daoism, but only the Laozi/Zhuangzi version. I couldn't care less about Internal Alchemy and all that. I studied with a Daoist priest and after two days I left because it was nothing like what I was after. It was then that I started looking at Zen.