The intuition of freedom

In the book The Science of Freedom, Rabbi uses our intuition that we have free will as evidence/consideration supporting that we have free will.
On the other hand, the rabbi admits that in certain cases (such as simple and unimportant decisions) we do not have free will and we choose according to circumstances.
Apparently (at least according to my perception) even in such decisions, we feel that we have free will (even though in reality we do not).
Isn't this proof that this intuition is an illusion, or at least a challenge to its credibility?
 
In addition, regardless of the previous question, does the rabbi know of a source (such as a review of the legends of Chazal) for Maimonides' claim that the legends of Chazal came to describe complex ideas / the events of Meracha and Bereishit, etc.? (I am referring mainly to the "difficult" legends, i.e., puzzling stories about demons, angels, delusional actions of characters in the Bible that have no source, etc.)
In other words, how does Rambam say that these are not legends and stories of demons that sages believed in at face value? To the best of my recollection, he does not provide any serious support for his claim…