That everything happens for a reason - there are no accidents, no coincidences, no mistakes. It would be possible, but in my view would be kind of silly.
Spirituality is all about relationships.
One's relationship to self, to others, to the environment, to life in general. A Spiritual belief system is simply a container for holding all our other relationships. Why not have one that is large enough to hold it all. In my personal recovery, I found that I needed a Spiritual container large enough to allow for the possibility that I was not a flawed, shameful being. I searched until I found some logical, rational means to explain life in a way that would allow me to start letting go of the shame I was carrying and start learning how to be Loving to myself.