The Road NOT taken: Why not just The Road Taken?

I think that the author chose to write "The Road Not Taken" because, the person in the story might have walked the wrong path. Therefore, regretting the path he was decided to walk upon, therefore, making the title "The Road Not Taken" to express his sadness. The title also may express the mystery beneath the story, causing the readers to think critically about about the story. Therefore, maybe, understanding it more. Another way of looking at the title, is that maybe the author and the narrator is curious about the other path. Thinking about what is that other path going to lead him/her, or how it looks like. He could be thinking about how his life now and the "road" maybe just to express his/her life. Thinking outside the box will create many reasons why the title is the way it is named. For the main reasons, I think that The Road Not Taken maybe that the person in the story went the wrong way, or the bad way, or just thinking about what will happen if he/she took the other path.