If you want something done the right way then you have to consult experts. But consultation also leaves room for error because the task is not being done by a professional. When you hire a professional to do the whole task then the possibility of things going wrong are very less. For example when you hire ghost writers you can be sure that the book produced by them will be very well written and will have absolutely no problems as far as technicalities of writing is concerned. What other benefits of hiring a ghost writer can you think of?