The needs vs wants framework is one of the most commonly taught money concepts, and one of the most commonly abandoned. That's not because it's a bad idea. It's because most versions of it are too rigid, too generic, and too disconnected from how people actually live. When someone tells you that coffee is a "want" and rent is a "need" and leaves it at that, they haven't really helped you make better spending decisions. They've just made you feel guilty about your latte.