The description of the Master Craftsman feat makes it sound like you can use any Craft of Profession skill as a prereq, that you can then take either the CMA&A or CWI feat, that you can substitute your selected Craft or Profession skill check for the check to create your item. Is that really the intent? Profession (Midwife) can be used to create a suit of armor? Or does the craft/profession skill need to be related to the task at hand as in the magic item creation rules?