Buddhism is being viewed as pessimistic because the world today is filled with so much external seduction, such as TV, Video Games, Movies, making money and many other forms of distractions that steers one away from reconnecting with one’s true self. All these temporal happiness deludes one into believing and immersing in a false state permanency. Many shun the topic of DEATH, because to them, death is far away and probably not having any idea on how to deal with it, they had rather stall it until they are old and by the time they realize, too late for anything. People view death as something very negative and try not to talk about it, but Buddhism is always talking about it.
The reason Buddhism talk about death is not to instill fear into people, but more to instill a sense of urgency to use this fortunate rebirth wisely to develop the precious mind which travels from one life time to another through studying and contemplating. Without practicing and developing the subtle mind, one will have much fear at the time of death. Hence, we should make these people understand that Buddhism is actually not pessimistic, but a wonderful chance to cultivate the mind. How fortunate can one be to even know Buddhism, one should cherish dearly teaching and practice diligently in order to benefit more people.