I can argue both sides of this debate.
My first question would be; We know placebo’s work. How do they work if consciousness does not influence the final result?
Our free will is limited to the attributes available at the level or frequency of consciousness that we have attained.
Your first question has nothing to do with free will. We humans take the simplest thing and try to sound so philosophical and smart. Free will is having the ability to make a choice. Nothing more nothing less.
Placebos work because the subjects choose to take them and they believe they are taking something that works. The result is not because of free will, it is a result of free will (choosing to take the placebo). You’re talking about the after effects of free will.
So, Pavlov's dogs don't really salivate at the sound of a bell because behavior can't be manipulated? And the broken window theory of crime control doesn't work?
Maybe at some 'micro level' this guy's on to something - but at the real world level where we live? Nope, he's another liberal/progressives nutcase making excuses for psychopaths.