Things are what they are.
Everything acts according to its nature.
Nothing escapes its own nature.
We cannot be other than what we are and our "choices" follow our nature.
Consequently, can we not say correctly that free choice is merely our ignorance of the fact that all our actions and choices are predetermined by our nature?
Example: If I offer you dog piss or a Dove Bar is that really a choice?
Only possible things happen. The things that happen are the result of events following their own natural bent.
Is free choice an illusion? Mathematicians will tell you there really is no such things as "random". You cannot program a computer to generate an actual "random" number. There is always an algorithm underlying it. Randomness is our ignorance of the nature of inevitable consequent events.
Just because you don't know what you'll pick to wear tomorrow does that mean you have a choice? Aren't your selections the result of how you react to things in a given circumstance?
Is there a difference?
In short: IS FREE CHOICE AN ILLUSION?