"Well, I'm not even sure what I mean, come to think of it... Firstly, I think it's a bit curious on a semantic level with a deliberate-looking use of "conscious" as the illusory. Does that mean that unconscious will is the real operative agency in regard to volition/will? Are you expressing free will, but only a portion is attributed to conscious participation? Is it still free will if you are unaware of it, either partially or totally? Of what sort would instinct be considered? I guess this might be trying to untangle "awareness" from "consciousness," or just see if there's any useful distinction between the two terms in relation to this."
The free will debate is ongoing, and ranges in perspective from dualism to determinism. As far as I know, only soft determinism and hard determinism are reasonable standpoints if you take science seriously as a philosophy. Soft determinists believe that the universe operates according to strict mechanical causality (determinism), but humans still have the capacity for free will. Hard determinists do not believe free will is possible in a deterministic universe. If all things behave according to causal chain reactions, then how could there possibly be anything independent of the sequence of events that constitute phenomena? It is not consciousness that is regarded as illusory, it is the experiences of agency and volition that are dissected. I do not know where this all stands relative to what you are calling unconscious will, as I'm not certain on what you are using that term to describe.
Semantics can make things kind of foggy when it comes to questions such as the difference between awareness and consciousness. We are aware of the things we are conscious of, but we are not always aware we are conscious of them. At a point the discussion becomes riddle-like, and questions beget questions with answers out of focus. While that is entertaining, it's semantic at the core.
"As an aside, but perhaps relevantly, I've wondered about some hypotheticals I tried to wrap my rational mind around. It might be leaning a little into metaphysics, but it might be a path that's useful to wander a little way down. Whatever it is that resides in us to give us the subjective experience of what we call "self" -- whatever it is that sees through these particular eyes rather than another's (seemingly, at least) -- might find it necessary to forget, ignore, deny the enormous limits (or even complete absence) of free will. This way the experience it receives seems unique, personal, and authentic. It takes a sort of paradoxical perspective of a single point and the totality.
Let's just put God into the picture, but only as a tool for illustration or for a lack of a better term that I can think of. If you were an omnipotent, omniscient, and omnipresent being, what do you do in order to make whatever game or experience you want to enjoy have the quality of total immersion? You make the script, set up the stage, wind up all the toys, then let it loose. Hop into whatever aperture of experience you wish to, like a character in a story or whatever, and you can experience it all as that character, totally... As if you (from perspective of the character) made the decisions, felt those feelings, did those things, but really it only feels that way and it has to feel that way in order for it to feel real. You have to lie to yourself in order to pretend to be real."
Yep. It is believed the experience of agency conferred some advantage which made it a favorable adaptation for natural selection. I think it's because sentience influences cognition in such a way that it makes self-preservation a personal affair.