Everything operates by the fundamental law of cause and effect, which is upheld by Newton's 3rd Law. This means that even your synapses in your brain fire because of things that made them fire. We don't have free will scientifically speaking. The thing that looks like free will is programming through cause and effect. This is scientific law.
You making an assumption that consciousness is a product of brain function, that has not been proved. This is why there is no unit of measure for consciousness. Some argue that our brains are merely receivers of consciousness like a biological TV set. Hence free will is not necessarily a product of cause and effect. Your free will could very well be influencing/driving the synapses in your brain that fire.
Now you are suggesting we should talk about some aspects of religion. The question is "Is science a religion?"
Consider. If evolution is real, why did it go to all the trouble of making two sexes? Why not have just one "sex" propagate itself? We might be able to list all kinds of reasons either way. But we should be able to at least find a multitude of single sex and tri-sex families that are as large as the two-sex family. Is evolution wrong? Did nature goof?
We don't feel like biological robots. Does this make it so that we aren't? My point has always been that there is a God, that there is purpose, that science is moving into the realm of religion among people.