I am beginning to think that part of the answer comes from understanding what is exactly meant. There needs to be an agreement on what the terminology means. Also, that likes most things, it is not a binary situation.
There is "Strong Free Will" which goes something like -
(a) it is “up to us” what we choose from an array of alternative possibilities, and (b) the origin or source of our choices and actions is in us and not in anyone or anything else over which we have no control.
There is "Hard Determinism" which goes something like -
the history, present state, and future of physical bodies and force fields in the universe, including the physical aspects of mental states. The hypothesis is that every physical state of affairs at any point in time is the causal product of two things: (1) an immediately prior physical state of affairs and (2) the laws of nature. “[D]eterminism” is the thesis that “a complete physical description of the world at a given time, together with a complete description of the laws of nature, entails every truth as to the state of the physical world at later times” - or earlier times, for that matter. If determinism is valid, it means that with sufficient information about the world and sufficient knowledge of the laws of nature, one can both predict the future and derive the past because every physical state of affairs that once existed, now exists or will exist in the future is inexorably dictated by what precedes it.
There are also "soft" versions of each theory.
So, perhaps it is like one person put it (in my own words) -
"In each present moment we are presented with a limited number of deterministic outcomes to chose from."
That is to say, we have some choice, but much has already been determined by prior action.
