Really? Do I have the power to grow a few inches taller in my old age? Yet, my height has been a factor (sometimes greater, sometimes lesser) in determining many of my actions through my life, and as well my race, my gender, the place and time of my birth, m family history, et cetera, none of which I could control. All of those factors have bounced me along a path that was largely determinable even by a human being who could have had access to all the factors.
Your initial settings and capabilities are determined beforehand, but most of your actions are totally under your control, even if they were influenced by your background. And in today's world, people reject God even in the ways you claim you are powerless.
Yes, I can grow a couple of inches taller, if I take the right steroids and hormones when I am young.
Technically, my race doesn't change, but I can lighten and darken my skin, get plastic surgery, and look like I'm in a different race.
I can even change my gender these days it seems.
I can't change my biological parents, but I can run away from home, estrange them, get adopted.
So yes, a life is presented before you that you didn't choose, but from the moment you become self-aware you start making changes to it, for or against the glory of God.
It's interesting that almost no secular philosophers believe in "free will," but believe that to some lesser or greater degree, human actions are externally determined. Even though scripture itself explicitly points out that human actions are at least greatly determined by external forces over which humans have no innate control, only Christians carry on about "free will."
Secular philosophers usually don't believe God even exists, so their point of view on anything religious is automatically biased and suspect. Scripture clearly states that we are all given choices, but that God's overall plans are unaffected by them.