The question is the ultimate intellectual jerk-off. People say they don't, but they go on living their lives making choices as if they matter. Not saying there is freewill, just saying it doesn't really matter.
I think its a worthy question, although I agree that its something of an abstract thought experiment, practical reason continues, as you say, to be applied and not all choices are given equal weight, even someone who is subject to compulsions, habituation and conditioning have some margin for choice.
It interests me because the vanguards of atheism have moved beyond attacking metaphysical ideas of God or afterlife, particularly as sources of meaning, to denying ideas associated with humanity, Darren Brown has done this in a number of his TV shows, Dennet has attacked the idea of free will, choice and consciousness in an even more vociferous, intellectual and academic fashion. The psychologists who reacted against behaviourism would be amazed at these sorts of turns and trends in thinking.
Personally, it interests and concerns me because most of this information is provided to populations of kids who're maturing later and later in life and probably dont have the intellectual tools to critically evaluate it, a lot of it is dense, convoluted and difficult reading material. Its often provided in academic contexts which reward recall and regurgitation of information alone. When its not its within the climate of dispute and conflict which has been created by moronic, dogmatic and alienating traditionalists and just as moronic, adversarial and in some ways symbiotic responses. Which only reinforces the tendencies to assimilate as material to be recalled and regurgitated in some sort of competition passing for dispute, passing for debate, passing for discussion.
Those trends bother me, not just because I, personally, cant be easily satisfied with the simplistic and reductive thinking which appears to be at the heart of theories like Dennett's and Brown's but because the whole thing seems like a sort of race to the bottom in thinking. Fables like the Emperors New Clothes were written at a time to try and guard against this kind of thing and representing a kind practical wisdom now they're all but forgotten and definitely not practically applied.