Even if the need for hunger disappears. Our previous variables/memories/wants/desires we collected would still factor into everything. Let's say we made a machine at this point to remove those variables from our brain. Well the action taken to do that or not would be predetermined.
So if we did wipe everything from our brains and started anew. Something would make our personality and it wouldn't be our own choice. Even if we planned for our brain to be rewritten a certain way before the reset. That's a predetermined decision factored from all the previous events experienced.
We're encompassed by a system and I'm not getting how the micro level as you name it. Would have any way for doing anything thats not predetermined by the system that's influencing us.
I don't think thats actually a bad thing if somehow the objects in the system can have a happy ending. The multi-universe theory in my opinion can make that happen. All the forces making life can repeat and be slightly different by having all events play out. That's my reasoning for hoping that existential crisis is not necessary.
Because we're all just a limited interface to the same singleton, and we act in an 'environment' module. The singleton is the one that controls the 'environment' instance, so the closer you are to the singleton the more you can override the 'environment'.
That's consciousness. I believe consciousness is entanglement with the reality 'outside' of our physical dimension (ether). And since that isn't a part of this physical universe, your thoughts are free. And the more you're 'conscious' the more you can override your environment and biology. 'Force of will', going against your biological and sociological programming to do something that you imagined in your head. And acting upon those thoughts only depends on you, but it takes a large amount of will (consciousness, mindfulness, faith, call it as you wish) to override the deterministic environment defaults and actually do it.
also, speaking of biology: all emotions and experiences are ultimately the side effect of the ratio of the presence of different neurotransmitters within your biological substrate, but just because you have a certain configuration, doesn't mean you have to absolutely feel the way that that configuration entails. everything that you end up feeling is relative to everything that you have experienced before, and as such it stands to reason that one can choose to respond to given signals from the body in ways that may not necessarily align with the obvious intent of those signals. this is most clearly manifested in the whole fight or flight dichotomy; cowardice and courage in and of themselves are no different in terms of the physical conditions that come together to manifest them. both situations will likely make you more focused and hyper aware, due to the release of adrenaline and the increased feeling of a need to act in order to continue existing, but the manner in which a behavior is constrained under either label is wholly dependent on how one chooses to react to said adversarial stimuli