STS Orion Crusader here, Polarizatunity.

[Stranger]

I don't know why, but this topic is hitting a nerve with me.  There's just something so horrifying about being trapped inside a machine, powerless.  A great horror movie plot, if I were into such.  But I did find the other account to which I had referred.  Here it is, from Convoluted Universe Book 3.

How is the human body not a machine exactly?

That may be an intriguing philosophical question - and I don't understand enough about the metaphysics of a human body to answer that.  But the question misses the point.  

What is clearly different between a human body and the above accounts is freedom.  We have it, they don't, and that makes all the difference.  The above accounts describe ultimate enslavement.