Essentially, the process by which we choose has to have been created and determined in nature by God if God is the creator of everything. This is not necessarily a conscious decision on God's part, but nonetheless his doing.

I believe the point to existing is independent of free will existing. In a general sense, as we are living creatures, it is to reproduce and maximize our lifetime endorphin secretion. However, this will vary from person to person depending on how goals are prioritized. Factors that contribute to one's goal in life are determined by God as is everything.