Pretty much, a being such as that becomes directly responsible for everything (and I do mean, quite literally,
everything) simply by existing. Not necessarily even by the possibility of their interference, but because their lack of action leads to consequences that they have full knowledge of.
So the concept of a perfect God is kinda boring, depressing, and also it wouldn't be good.
I've argued extremely strongly against the existence of a perfect God in the first place even being
possible, let alone likely, but for this discussion's sake I'm just assuming it somehow works.
Emphasis mine. It's still a choice; you are a slave to your agency just as much as God is, God just knows more.
In the context of this argument though, God doesn't just know more, God knows
everything.It's like if I had a button, and if I pressed it, an ant mound was destroyed. If I didn't press it, it wasn't. In this scenario, I have exactly two choices, and regardless of what I do I am wholly responsible for that ant mound's fate. In God's case, the choice of to press the button or not press the button occurs an incomprehensibly large number of times, and decides the most minute of things. Like the individual location and molecular arrangement of the specks of dust that float into the air when you hit a cushion. But ultimately, these things are due to His choice, and His choice alone.
However, we, as humans, do not have things so simple. That is, we aren't aware of the total and utter consequences of every choice we make. God is.
If we start off at point A, and end at point C, that's not within our control. We don't know the consequences.
If God starts at point A, and ends at point B, that's
entirely by His will, it can't
not be. We could toss a coin, because we wouldn't know the outcome of that coin toss. God couldn't, He does.