When people ask us how we are doing, most of the time, they are not really interested in hearing a detailed response. It's often just a social convention or a polite way of acknowledging someone's presence.
Therefore, it's become common practice to respond with a smile and a simple "I'm fine" or "I'm good," even if we're not really feeling that way. This response allows us to move on with the conversation and avoid burdening the other person with our problems.
While it may seem like no one really cares about how we're doing, it's important to remember that everyone has their own struggles and challenges. It's not that people don't care, but rather that they may not have the time or energy to delve into our personal issues.
Furthermore, we shouldn't rely on other people to validate our feelings or emotional state. It's important to take care of ourselves and seek support when we need it. This can be from friends, family, or even professional help if necessary.
In My opinion
responding with a smile and a simple "I'm fine" is a common social convention that allows us to politely acknowledge someone's presence without burdening them with our personal problems. However, we shouldn't assume that no one cares about how we're doing and should take care of ourselves and seek support when needed.