First of all, Sapien Medicine (which is a group, not a person), does not preach anything. Some of these tools needed, because people believe in them, and subjective experiences cannot be rejected as untrue, though they may not be universally true in an absolute sense. Your conclusions are very simplistic.
By your logic, demons are “dark”, angels are “light”, occult is “bad” etc., which are hardly objective truths! What really is “dark”? Darker than what? Lighter than what? If only the Universe was so simple that everything can be boxed into two categories!
Are you going to get everything you want by “not fucking around”? Are you getting what you want “by fucking around”? Try, but I doubt you will get everything you want in either case.
No energy is negative or positive in a true sense. How one responds to a certain form of energy and interaction with it can be used to perceive whether it can be termed negative at that point in time.
Nietzche deals with this dichotomy. Basically he says that there are two main kind of morals, master morality and slave morality, which he identifies with Rome (or the Greeks) and Judea (or the Christians). For Master morality, good is the powerful, beautiful, glorious that conquers and rules over everything, bad is that which is weak, ugly, without hunger of glory. Slave morality represents the upheaval of the slaves, whom driven by “beautiful hate” invented a new set of values, the Masters were now those who were bad (or better said, “evil”): Sadistic destructors that had no reservations on using their own strength to prevail over the weak. And now the weak but respectful of other people, those armed with compassion were those that in the slave morality are the “good”.
The good/bad binary is a product of Greek and Roman thinking, it characterizes morality by celebrating power and excellence. The good/evil binary is a product of Christian morality that is characterized by the priestly caste and resentment. A lot of our sense of Good vs Evil are just handed down moralities. The simple difference between good and bad, and good and evil, is the question of where the assessment begins. For the master morality, assessment begins with oneself as being good. For the slave morality, assessment begins with others (specifically, those in power) as being evil, and the assessment of oneself comes secondary, as being in opposition to the evil.
Nietzsche is proposing the idea that we should carve our own sense of morals based in what we think is good and bad relative to us, or what is being a free spirit, rather than adopting the good/evil moral dichotomy presented to us.