Christians have several kinds of explanation for why things-in-general set-up the way they are:
1. They could not be otherwise.
2. This is the best way. (Things could be otherwise, but this is the best of the alternatives.)
3. This is the best that can be managed, at the moment, given the constraints.
The third explanation sees God as working within constraints such as time, process and substance - also the existence of purposive evil (Satan and demonic activity).
The kind of answer we are looking for to this question of why things-in-general are set-up he way they are also varies.
1. A physics-type reason in terms of fundamental structures and processes. This is the view of Classical Theology.
2. A relationship-type reason in terms of the purposes, desires, affections and aversions, wishes and needs of the personages involved. This is the view of Mormonism.
3. A psychological/ therapeutic reason to do with individual well-being. This the the view of Liberal 'Christians'.