No matter how closely parents try to manage their children's lives they can't possibly protect them from life's trials and tribulations. Indeed, parents shouldn't protect their children from those things. Parents should guide their children instead in how to effectively manage the challenges they'll face on their own.
When fathers are absent from their children's lives -- physically, emotionally, or spiritually -- it costs them dearly. They give up the benefits of being involved, responsible, committed dads -- such as the love of their children and the joy of seeing their children grow into adults -- and the benefits of mothers' love in raising children together.