Some seem to intuit that divine freedom is in competition with creaturely freedom. The assumption is that when God is acting, that necessarily drives out the action and initiative of creatures, and vice versa. The ancient Christian conception is that human freedom cooperates (synergizes) with God. Jesus illustrates this concept most clearly, being both divine and human and fully free in both respects. This union is an essential part of the whole plan in this view, that God would be present in His own creation and not infinitely apart from it. In this model the free action and cooperation of created things is essential to accomplishing the divine purpose.

On the other hand, if God really does just determine everything, you basically get pantheism where everything is an immediate and direct expression of “God.” That sounds like atheism with steps.