That is a very pull your socks up or shut up attitude. I find that people don’t do things, including writing, for all sorts of reasons. As an example, I sometimes teach voice work. I have worked with people who mumble. I found more than once that they would start talking more clearly once they had talked over some trauma. I did allsorts of technical work with someone who was really hard to understand. It helped a bit, but not a lot. For some reason we started talking about how we had both seen our fathers try to strangle our mothers. His voice grew clear and easy to understand. If you have faith in a professional you may well do what they say. If they say you will never write a book and you have faith in them you may well believe them and act appropriately. It is the opposite of the placebo effect.