Why are there many tragedies in Shakespeare's works?

I wonder why Shakespeare's works are tragedies for most people, and also consider the tradition of western literature. In ancient Greece, Aristotle systematically discussed tragedy, thinking that tragedy can purify people's hearts and make people feel lofty and happy. Shakespeare's thought will inevitably continue the tradition of praising tragedy in western literature. Tragedy has more aesthetic value and vitality than comedy. Tragedy makes people feel more profound and causes more thinking. Moreover, judging from the present situation of human existence, human beings live in more pain and misfortune, and tragedies will inevitably appear. The ultimate concern of human beings also makes people realize the necessity of reflecting on tragedy. Fate and environment bring people a sense of tragedy that is hard to crack.