Free Will/Destiny Spectum

The Free Will vs. Destiny debate is one as old as time itself. There have been countless arguments for both sides, and most of them are soldly logical. No matter what anyone says, it all comes down to the simple fact that there is no worldly way to prove either side. That is why I believe there is a spectrum between free will and eventual destiny.  I have no physical proof for this, like everyone else, but I do have logical reasons for my belief.  Naturally, us humans are given the feeling that we create our own future and make our own independent choices to determine an unforeseeable future. Religion brought in the idea that an omnipotent being has control over every aspect of everything, therefore every human's past, present, and future life has been mapped out and predetermined before they are even born. I think this way of looking at life is much more depressing, seeing as one has no control over how one's life will turn out. With a "Free Will" mindset, it puts more meaning to ones life, seeing as one has complete and utter control over one's future. Now here's where it gets tricky. I do think at some point, one has a destiny from birth, mentally handicapped people for example.  They are born with something, out of their own control, that hinders them (in most cases) from ever having the choices most fully-functioning human beings are capable of making. This is why I think it is impossible to say free will and destiny are mutually exclusive.