That they won't, I agree, for, as this thread shows, libertarian and individualist ideas are stronger in this demographics. I also agree that FOSS is useful even in its current state, but being useful is not a goal of free software. Freedom is a political notion.
And common people do not need to care that much about free software ideas to consider political goals of the movement to be fulfilled, the same way today's workers do not need to care about socialist theory to enjoy workers rights.