Respectfully, I disagree. Take your example about drunk driving and killing someone. The pain and suffering that person will experience in the aftermath will be

Respectfully, I disagree. Take your example about drunk driving and killing someone. The pain and suffering that person will experience in the aftermath will be enormous. But you know what? Everything we experience in life is in contrast to our past experiences. It would be likely that person had never experienced such pain, shame, sorrow, and suffering before this experience. Therefore, every experience of joy they have thereafter will be in contrast to this deep despair. As messed up as it sounds, many times extreme tragedy can lead to more joy and happiness than would be possible otherwise. Simply because they have more awareness and appreciation than they did in the past.