Why does tragic heroes have to be high and prosperous?

Because their culture was base on gratifying the image of honor. Such as the American culture is base on gratifying the image by becoming a celebrity either in the classroom or in life. A true tragic hero is to help both who fell in the illusionary images out and those who are out of the illusionary images in through compassion, making him having no life for himself that is tragic, and a teacher thus a hero. @ dan020350