It's like this, some people only feel a lot better when they express their sadness openly. It might make them feel not alone in this big yet small world. And others might prefer to keep it bcos they might feel that it is not necessary for them to express it and they might be worried that it will only create trouble to other people if they express the sadness. Therefore, it depends on how people view it and how they make them feel, imo. So do I answer your question?