I think cookery programmes feed the voyeur in their viewers and nobody really tries to make their own cooking 'perfect'.

Maybe this is just a UK thing - where perfection is appreciated for a nanosecond and then everyone's back to looking for risqué jokes in everything (hence, the 'soggy bottom' meme in that baking show - which btw is hosted by a a well known satirical comedienne whose apparently mild comments have an undercurrent of loathing).