One of the key principles of money is ‘opportunity cost.’ It means that when I buy something, I have to give up something else in return. We think we buy because we need something, but we often forget that we could buy something else instead. We rarely consider ‘opportunity cost’ when making a purchase. We do not compare other values against our needs. Buying something means giving up something else, but we often don’t realize it. When we spend money, we should also consider the ‘opportunity cost’; yet, in reality, we aren’t trained to do so. By making a purchase, we bypass the value comparison that may not offer any additional benefits. Maybe it’s because we lack knowledge, or perhaps the idea isn’t appealing. - Joseph’s “just my thoughts”
You probably suspect that your decisions are reasonably based on your judgment. However, human decisions are made according to the rules and structures at that time. By changing the decision structure and regulations, humans make different decisions under the same conditions. If you make a mistake, you don't have to regret or blame yourself for making the wrong decision. But, if you fail to judge the regulations and structure of the decision, then you must reflect on the mistake. This is to prevent repeated mistakes. - Joseph’s “just my thoughts”