the professions that absolutely depend on a specific degree would of course include engineering, accounting (CPA), and obviously medicine.
if you contend that business degree is essential...you are over emphasizing that. look at virtually any aspect of business including wall street. majority of the entry level jobs have no college prep for real job. you leverage connections and relationships to attain a shot. perhaps a person who can write is more qualified for certain business jobs, international studies well rounded in world knowledge and so forth. these are also usefull tools in the business world.