I think that it stems from the ideas of sovereignty and providence. The former being "God's absolute right and ability to do all things according to his will" and the latter "the foreseeing care and guidance of God over His creation". Here is what, in part, I shared on that a few years ago in a post that I called
"I like Providence more than Sovereignty":
"We can error if we believe that because God is sovereign He wills bad things to happen us. We can also mistakenly take His providential care for granted thinking that our actions are not important because He can use bad stuff as well as good."So when I think about God's timing being perfect I don't think of timing so much as a sovereign chronology of time but more as an opportunity to trust in the providential care and presence of God. I think more of God being there when things happen rather than God making things to happen. Maybe is more about the perfect presence of God rather than the perfect timing of God? What do you think about these ideas of sovereignty, providence and perfect timing?