The myriad of service manuals, technical drawings, service bulletins, assembly instructions, etc., etc., etc., in existence would seem to support your belief.
However, to play Devil's advocate in Larry's defense, there can be serious consequences when these instructions find their way in to the hands of people who have no mechanical experience, no mechanical knowledge, no mechanical aptitude, but believe that they can perform a procedure because they can read. Most manuals are intended for the people who will maintain a product, not the general public. There is the expectation that the user does have mechanical knowledge, experience and proficiency. They are not written to hold your hand with basic principles that they expect that you should already know. They expect a certain level of competency. When there isn't that basic minimum knowledge and competency things can go wrong. I suspect Larry is concerned about his instructions being in the hands of such people.
Regardless of that I don't believe that less information is better. Everyone can not be held by the hand. Put the information out there, written as well as we can write it, to the benefit of as many as possible is always a better option.