A NYTImes Opinionator piece by Massimo Pigliucci and Maarten Boudry is a must-read short essay on the Dangers of Pseudoscience. It explains why pseudoscience is not "a harmless pastime of the gullible."
"This, however, risks confusing the possible effectiveness of folk remedies with the arbitrary theoretical-metaphysical baggage attached to it. There is no question that some folk remedies do work." When they do, science can validate their effectiveness.
For example, the notion of channeling “Qi” energy through the human body via meridians sounds scientific. But with no way to test the existence of Qi, "it isn’t even in the ballpark of an empirically verifiable theory."
Philosophers of science honor the value of positing unobservable entities, such as "the famous Higgs boson, a sub-atomic particle postulated by physicists to play a crucial role in literally holding the universe together" that was inaccessible until just this year.
Qi is nothing like Higgs. Higgs had been predicted on the basis of a mathematically sophisticated and repeatedly verified physical theory (i.e., the Standard Model). In contrast, Qi is not really a theory, but "just an evocative word to label a mysterious force of which we do not know and we are not told how to find out anything at all."