Why did Frederick William make the final decisions even after listening to his advisers?

Frederick William, the Great Elector, adopted a "government in council" style of rule, where he functioned much like a president by utilizing a principal council to assist in governance. While he consistently listened to the opinions of his advisers, he made all important decisions himself because he viewed royal power as a God-given duty.1

This perspective was deeply rooted in his Calvinist beliefs, which compelled him—much like the least of his subjects—to prove himself through his daily duties. Consequently, he exercised his authority with immense, yet restrained, energy, taking personal responsibility for the direction of the state.1