Life takes sometimes very wrong turns. Do you think people want them?

Most of the people would take a -No- for an answer. However, without even realizing what the "no" means to them. It's sad, because people do things that can hurt others without even realizing what they are doing. The trip on earth is so short, and people hurt each other, why? Is there even a need for that? I guess they make decisions without even being aware of the kind of decision.