Jeremiah discusses the worldview of a “zero sum game” in the context of a relationship with God. The hypothesis is that if we see God as limited in any way, we will relate to Him and to each other in an unhealthy manner. The experiment is to expand our awareness of the limitlessness of God.
It is ok to have earnest desires! Great point—looking at what we want honestly and taking them to God. Delight yourself in Him and he will give you the desires of your heart. (Ps. 37:4)