PBS has had some of the best cooking shows over the years.  Actual chefs who are trying to teach you how to cook or that show you a great recipe, ...  The food network started off that way but went the direction of profits by making it entirely reality.  I don't think Guy Fieri has ever spent more than an hour in a kitchen, unless it was to observe other people making food that he then slathers over or to hit on attractive female chefs.