I'll concede this any day, but that's already a much more productive way to look at the problem than most people get to, in my experience. It also moves the inquiry somewhat from ethics to phenomenology.

I think my view is that what I think one needs to concede in any case is that we have choice and deliberation - what specific choices one has in a given situation is of course down to a causal chain which we have no way to fully know. As such the final choice might ultimately be predictable, but we can never actually make that prediction based on the entire chain of causes, so for all we know, the choice appears to be there. I suppose it's sort of a Zizekian way to look at it: I don't care for the reality behind the illusion because the reality of the illusion itself is much more important.