When you are writing a screenplay it is important that you create obstacles that your main character or characters must overcome. Essentially if you have no obstacles you have no story.
It is funny that in our own lives we are often tempted to a crave a life without any heartache, without any enemies, without any obstacles. It would be nice to have the happily ever after bit… in the beginning, in the middle and at the end. Unfortunately that is not a story that anyone would ever want to watch.
Character is developed through fire, you find out what people are really like when they are forced to face their biggest fears. Trouble brings people together… love is far more common in a time war than in a time of peace.