One of the biggest sources of parental pain and suffering (which inevitably trickles down to the children) is the belief that children must navigate themselves through a stress- and trauma-free childhood in order to grow up happy and healthy. Thankfully, that simply isn't the case.
Not only is this an unreasonable goal, but you wouldn't want it for your kids even if it could be accomplished. A child who grows up having never experienced painful events or adversity becomes a maladjusted adult. In fact, overprotective environments (where parents try to shield their child from any negativity or walk them through life, handling their problems for them) can be just as harmful as more traditional forms of abuse or neglect. (GCF, 2012) It develops dependency, incompetency, and a personality that is easily broken down and overwhelmed by even the slightest setbacks. Shielding your child from adverse experiences can be just as destructive over the long haul as abusing them. So while we shouldn't go seeking out trauma for our children, experiencing adversity hardly means all is doomed. It can even be beneficial.
Childhood was never meant to be easy. In fact, if you imagine what childhood is, it's one life trauma and obstacle to overcome after another: being born, learning to speak, learning to crawl, learning to walk, taking tumbles, learning to talk, potty training, encountering ‘monsters’ under the bed or in the darkness waiting to devour you alive, the thousands of little traumas that come along the way as children test their limits and learn about their world, day care, babysitters, starting school, making friends, being teased, perhaps enduring a move or two, puberty, etc. Children do not need to be shielded from stresses in life (only protected from chronic, ongoing stress). They need to be helped through it by a comforting adult who will give them positive, prosocial perspectives on the traumas they do experience.