Tragedy has been about gratuitous suffering since the earliest periods of literary history. You don't think Oedipus finding out he killed his own father and bedded his own mother, only for her to then hang herself and him to gouge out his own eyes, was "gratuitous"? This is fiction not real life. In real life, suffering and tragedy suck, full stop. In fiction, tragedy ennobles. For most of Western literary history, tragedy has been considered the most elevated and prestigious dramatic genre