The statement is that if he cannot verbally pass that information on and have them get interested/excited, no amount of documenting and cataloging that info is going to make them suddenly want to read it. No level of explanation is going to be helpful to them when they don’t care enough to listen/read.
And I claimed nothing about “someone who does the job is valuable”. My claim was that there are, generally speaking, three types of workers and the vast majority of workers are unlike OP, in the sense that they probably don’t care in the slightest because they are 9-5 workers or someone who would rather learn themselves.