I don't think anything you learn in school is useless just because your future job doesn't require that knowlegde. In fact no knowlegde is really useless. It doesn't matter if you learn about physics, chemestry, history, religion, philosophycs, literiture or geography. And if you want to learn some usefull skills go to your friends and relatives, look how they do it and show some initiative. School should not hve to teach you simple tasks like cooking.