Well, cooking/baking are in fact science. Tossing stuff in a pan and hoping for the best won't make a chef. It would depend on the caliber and training on whether or not that type of ego was warranted. A full half of the chefs I've known in my lifetime, it's not. Certainly the behavior isn't warranted at all but there's something in their make up that makes them very possessive of their kitchen and the food it produces. I've even heard my own DD (swear, one of the nicest, sweetest people you'd ever meet) say things to the effect of "If it's going out there with my name on it..." I obviously did not inherit the drive for fine cooking or baking so I can't say where the mentality comes from but I've sure witnessed it plenty, lol.