And just how do you know that you did not make that choice based on a free will decision on your part? You don't!
I freely chose to repent and believe after God had given me a new heart and new desires. If God had not acted first I never would have come.
This scripture speaks to my conversion very well
Rom 10:20 But Esaias is very bold, and saith, I was found of them that sought me not; I was made manifest unto them that asked not after me.
I was a lost sheep and I was too dumb to know it. The Shepherd had to come and find me and bring me in through the sheep gate.
Seeing that God knows all, including the future and what anyone is going to do, is all powerful, and He is never wrong....then how could anyone do anything other than what God wants them to?