If consciousness (and choices, the output of consciousness) is completely determined by the brain's physical process, then there is no such thing as "libertarian free will" which is what people typically mean when they say "free will".
You think metaphysical libertarianism is meaningful ("meaningful free will"),
You also think it's false (why, if it's meaningful?),
You aren't bothered by this,
And something vague about empathy. Is that like "it's not your fault, you had no free will"? So about blame?
But the function of blame is to manipulate people's choices, and that works even when we acknowledge that the choices result from physical processes.
> You also think it's false (why, if it's meaningful?),
Why would we expect any coherent phrase like "metaphysical libertarianism" to be true simply because it contains meaning?