(1) A recurring type of comment in this forum is:  "You can't learn from books" . . . "You need a teacher" . . . and  "Details can't be discussed here".   (2) Basically:  some knowledge is dangerous for people and should only be shared/explored in context of teacher/student relationship.   (3) Really (?)   (4) What's the rationale for such a conclusion (?)   (5) Does the Dao care if 999,999 people go crazy trying a practice . . . as long as the millionth person succeeds with it (?)    (6) BTW:  If beginning in the 1960s, the thousands of years of Chinese secrets hadn't been revealed  to the West (including you and me) . . .  they'd have been lost.   (7) My opinion: There are more realized Taoists in the West today than in China.   (8) And how about:  centuries of Judo training in Japan . . . and within a couple of generations of training, the Dutch were kicking the ass of the Japanese  (?)