Are you cutting off the branch on which you are sitting?

A person in my professionel network said: “It´s funny that you teach people to do what you do…and cut off the branch on which you are sitting!”

What do you think, is he right? My answer is no. On the contrary. For what is it really about? It´s about sharing what I know about the advantages of using drawings in meeting-situations. The more people I can convince about these tools the more people will use them and the more assignments I´ll get – I know that there is a limit to the number of tasks you´ll be able to take care of yourself.

What about you? Are you aware of the fact that it makes sense and adds value to share your knowledge instead of keeping your cards close to your body, in fear of being copied?