Knowing how to cook food (pizza) is as relevant as knowing how politics, ethics/laws, businesses, languages, economics, and cultures work and contribute to the society progress/economic growth (but one does not need to know everything as far specialization is at work). Science is no different than other fields. Where would be the science if people simply don't have enough food to eat/money to spend (due to recession, politics or other reasons which might be caused due to people ignorance about those fields)?