I was trying to poke some holes in what you wrote, but found myself unable to do so! so - well said. I'll have to reflect on that a bit.
However, you said: "and the time is not ours to determine"
This is a direct attack on our free will. If God's will has a structure similar to us and our brains, as shown by the picture in the paper, then His will can effect us, but cannot be all controlling. This agrees with the Christian general philosophy of paths laid out by God, which one chooses. So, there may be some instances where we cannot control our own death, but I would argue there are at least some where we can.
Oh, not at all! We can choose -- between God and no-God. But, life is not ours to take. If we choose to take it, we do an unrighteous act -- and condemn ourselves with our own free will because we make a decision that belongs to God. We are free to choose, but that choice must not implicitly reject or replace God. As James points out: works and faith must go together.
BTW, once you accept God in your heart, you are never free again to choose against Him.