It missed one important aspect: the average body structure of an average person is not perfect. And, one important consequence, therefore locations of the acupunctural points will not be exactly the same for each person or patient! And in order to find, and therefore, to needle on the exact locations requires the good experience of a good acupuncturist. And such understanding cannot come upon with one or two years of supervised practice!
Good chi king masters know it all the time. In chi kung, the focused points are oftentimes similar to the acupunctural points (in concept if not in delivering the same healing result). In chi kung, getting the right focused points will be the joint effort of a good teacher (sifu) and his or her student. The reason is that ultimately it is the student who is able to feel and mentally-cum-physically act on the points.
In conclusion, self-learning is chi kung is possible, but in most cases it will be better with the personal coaching of good teacher (corollary: mediocre teacher and large group training without the benefit of individual coaching will be insufficient). On the other hand, if you are seeking the service of an acupuncturist, make sure you find a good one!