I agree with your analogy with reference to pharmaceuticals, but it is not a case of they had a look and it wasn't there, it's a case of developing the skill (without the special powers bs), and just because you have not looked, or only looked once and it wasn't there, does not mean, it's not there.
Even the special powers "BS" is not BS. It is just rare. I have been witness to a number of miraculous events, the explanation of which requires subtle energies that are at present outside of the reach of scientific discernment and investigation. These things do exist but the manifestation of them, in a way that seems to break our present understanding of the world, is very rare. Rare enough that setting up a lab and telling someone to "do it" is probably not going to happen and if it does it is extremely unlikely to be repeatable.
I don't say these things to convince a devout skeptic or even someone who is firmly agnostic. I say these things and take the heat from people because there are some people who know or strongly suspect this area of life is real and who need to hear that others know or strongly suspect it too in order to build their whole practice on it.
It takes a lot to train in such a way as to increase ones awareness of these subtle energies. A lot. Everything must change if that is the goal. The motivation must change in each and every moment of practice (much easier said than done), a sensitivity to what attitudes and approaches increase awareness of these energies over time must be gained and then the person must be wiling to switch from attitudes and approaches that wont lead to an awareness of the Tao to ones that do, and sometimes this change runs very contrary to a persons preferences. It can be quite difficult.
Even though benefit from this approach is guaranteed there is absolutely no guarantee IMO that supernatural powers will result from the practice but that does happen sometimes. What is guaranteed is that the person will change into a better person with much more range and a much higher quality state of being that they can take and share with life. What is guaranteed is transformation, over and over again into a better and better human being. A person will grow in humility, softness, femininity, receptivity, grace, fluidity, strength, willpower, fierceness, masculinity, activity etc.
These changes come from noticing how the Tao is manifesting itself in the person and being receptive to it and allowing of it--day in and day out. This is a lot of work in some ways and self will and agenda have to be surrendered and a new attitude of flowing (easier said than done because it often goes against our preferences) is grown into.
In my experience none of this can happen in any serious way unless the primary motivation for practice, in real time and consistently, is for this to happen. It has to be first and I think a good teacher is extremely helpful too.