I understand your apprehension. It seems inaccurate that by reading the books, you can become as knowledgeable as an EMT student who took a course.
However, what “Ashreinu” was looking for was “for personal pursuit to have the knowledge of it”.
While there is value in taking a course (I am an EMT), any good EMT (or doctor) will tell you that most of the SKILLS they learned were “in the field”. The skills required to pass the state exams, and the amount of experience necessary to do so (about 10 hrs of observing activity in an ER) are minimal.
In my experience, one can become proficient as an EMT by thoroughly studying the material, and putting it to practice. (You cannot become certified w/o a course, though)
Again, since we are dealing with a question of knowledge, most of the knowledge gained from taking courses can be learned from the books. Consider the fact that an EMT’s job is not to treat but to stabilize and transport. It’s really quite simple. The diagnostic skills that make an excellent EMT can only be learned one way, [working knowledge +] field experience.