They won't either because it doesn't. The body conducts consciousness (Which is who/what we truly are in and outside this realm) and then modulates it through layers upon layers of subconscious conditioning and various perceptual filters/expectations before stitching it together to create the narrative presented to that Adulterated aspect that sits inside the Mind Made Prison inside your head and continually mistakes labels for experience. Why do babies bounce whilst old people are hunched over and shuffling? A flexible mind and body are one and the same thing as it equals clear conduction.
A lot of people believe the story because its designed that way but the mystic marches to the beat of another drum as the only way one finds enlightenment is by being willing to step inside the darkness where one finds... Imagination. The true source of everything and the gift each child brings with as they step into this realm as they gladly share it at every opportunity they get. Then its trained out of them by the System.
To keep it funky
I really have my doubts about free will as well because it all seems to be scripted and much closer to Maggie twisting the wheel in the Simpsons whilst Marge is driving. Just like when someone goes to see a "psychic" they edit the misses and track the hits (just like Maggie) and convince themselves they are actually in charge when its obvious that is an illusion because if they truly were they could stop their mind thinking on command and yet can't.
Consider that.
If the most basic thing which is you (ie whats inside your head) isn't under your control then why would you even believe the rest that follows is based on your whims? In reality we're living scripted existences and these too can be mapped and proven, scientifically, as I worked on an algorithm to create the most optimal marriage partnerships based on resonance back when and the implications were so earth shattering and that fell by the side to work on the Game of Souls hypothesis instead.