Except that Santa was never created to explain some object outside of their ability to explain, it was a cultural myth that has always been known to be such.
Also, define "good" please
Are you getting at that I can't define good and evil without an external entity to judge it?
Yup. Good, bad...any judgment requires an objective perspective. I've seen arguments that attempt to claim social preference as such a perspective, but it falls apart upon further examination.
You can take my example to be "Why does anyone have to die in a freak accident?"
To be honest, I do not know. All I can say is that we are all mortal bodies with an immortal soul. There are no guarantees how long we will have in our mortal bodies. However, since we have immortal souls that will continue to live beyond death, then the length of our mortal lives takes on relatively less significance in my view.