We are going in circles. PoeSalesman, can you try to read what I have typed in starting post and in my answers already?
Because they reduce redundancy of functional tissue. Learn the role of redundancy in physiology on living beings.
It does not mean that they are harmless for said body, only that level of harm is tolerable and acceptable.
You did not understand it at all. What I am speaking about is structural integrity of body as working system not simply as physical object. And structural integrity of working system depends on its fault tolerance, which, in turn, depends on its functional redundancy.
And why do you think that your new robotic stomach, being the same in size and more functional, would have the same fault tolerance as your “native” stomach? Or that it would be just as well intergated into all systems of your body as your native one?
To you. Because you do not know engineering and physiology.
And who said that it would be “a bit”? This, again, depends on exact numbers that would be assigned to CBMs.