It could be that O'Brien sees war stories as misleading, not showing the full impact on human lives and values. That's why he insists they're immoral. Also, sometimes these stories can romanticize war, which is far from the truth.
Maybe O'Brien thinks war is just too complex and chaotic to be neatly labeled as moral or immoral.
O'Brien might write war stories to give readers a deeper understanding of the realities and impacts of war. It could also be to honor the people he knew during those times or to raise awareness about certain issues related to warfare.
Maybe it's because he has deep personal experiences and emotions related to war that he wants to express through his writing.
Tim O'Brien might write war stories to express his emotions and thoughts about war, and to give a voice to those who went through it. Also, it could be a way to document history and ensure that the lessons of war are not forgotten.
Maybe it's because those war experiences have had a profound impact on him and he wants to share them.
Perhaps writing war stories is his form of catharsis. It allows him to express emotions and thoughts that are otherwise difficult to verbalize. Also, it could be a means to honor the memories of those involved or to offer lessons for future generations.
Maybe he wants to share his experiences and perspectives with others.
Maybe O'Brien thinks that war stories often present a complex and ambiguous picture that can't be neatly classified as morally right or wrong.
O'Brien might write fiction to entertain readers, to offer unique perspectives on life, or to escape from the realities of the world and delve into her own imagination.
It could be that Tim O'Brien makes up stories to entertain, to make a point, or to offer a different view of reality. Sometimes, fictional tales can have a deeper impact than plain facts.