Mr Grumpy: Cooking with wine

I've turned the clocks forward an hour to change our drinking curfew and have pre-recorded our favourite cooking shows. Cooking shows stimulate the appetite and add extra pleasure to meal preparation. In an ideal world we would watch a demonstration, then prepare and eat the same meal immediately afterwards. Bliss! I have a small niggle when the celebrity chefs cook with wine. They tell us to only use wine that we would be happy to drink - preferable they wine we plan to drink with the meal. That makes sense when you are adding a splash to the dish before serving, but makes no sense to me when you need half a bottle of something for slow-cooked stews and casseroles.

If you can't taste the wine in the finished dish, why would you want to sacrifice an expensive and tasty wine?