Of course if we dissect the story we can take the zombies as a metaphor for the way we live life now (barely talking to others, always hurrying to fulfil a chore that doesn't improve things and constantly consuming). The survivors fighting to stay alive represent all of the things in human nature we wish to forget (greed, despair, self-loathing and punishment, fear) but this should never be ignored because it's what makes us human along with the hope, the love and the joy.
So I'm thinking what's the point of being a zombie through life (school, work, marriage, kids, retirement, death) when there are no rules, only those we make.
You don't have to make millions to be happy. You don't have to go on holidays to get away from a job you love. You don't have to fall in love once.
What makes us human is our ability to feel and share with others. No two humans are the same exactly, though we start as the same innocent kids and end up dead, it's how we live and share that makes us unique and less like a zombie.
If we give up on our hearts and follow the hum drum of what's expected (school was preparing us for that life of servitude and repressing emotion) then we might as well jump into the grave with both feet and claw the dirt in after ourselves.
I will say I had severe panic attacks the first couple of months away from high school (crying hysterically) unsure of what to do next because I was so use to the order and safety of being told what to do. I hated it there and I'm glad I don't remember much. Since I've been out for four years I have made some great memories. As long as I hang onto them and find worth in them they will always stay alive. Like the memory of my grandmother's funeral and crying into a friend's arms. The memory of getting ready for a night out with my two best friends (not anymore). The memory of changing jobs over and over. The memory of writing my first novel and giving to my mother to read.
Quod tu es, ego fui, quod ego sum, tu eis.
What you are, I once was, what I am, you will become.
A great beginning and ending but in between you have to pass through life, and it's your decisions as to what rules you make.