Yes but they still make choices that reveal their preferences.
Which is why it's a coordination problem that requires a motivated leader like the government instead of throwing our hands up and saying "gee it sure sucks that everyone has revealed they like will buy the products on the shelves".
Which is why it's a coordination problem that requires a motivated leader like the government instead of throwing our hands up and saying "gee it sure sucks that everyone has revealed they like will buy the products on the shelves".