Everyone is going to know something a little bit different and bring different experiences to the table and that’s why hearing from different kinds of people has value in terms of the variety of stories being told.
Sly makes the salient point that you should write about what you know and the human condition from your perspective.
If you do that with those three essential components, you’re on the right track towards making a good movie.
If you write about what you know it will be genuine and true.