Well, mine is an opinion, of course, as I made clear.
There are those who believe that the question of free will can be (or has been) "answered" by "science" as well (mostly answering: we haven't got one).... and I disagree.
The "one thing" you seem to agree that science hasn't answered is imo the crux of the whole issue, that is to say why and how does the thought processes that can (unsurprisingly) be detected in the form of brain activity give rise to something such as that thing which we call consciesness.
Ive probably been the poster with most number of heated discussions in this board over the years.... and I can assure you I won at least 90% of them.
dhobi ka kutta, na ghar ka na ghat ka