This is a difficult situation. I certainly understand where you are coming from. There is comfort in knowing for certain...especially after multiple swaps of the same part. On the side of reality, I would be surprised if we ever know for certain, unless they discover a major defect and recall all the steering boxes made during a certain period.
I agree that the problem may be more rooted in communications problems, calibration issues, or incompatible versions of components and firmware. My guess is that these contributing issues were minor before, but after the steering recall, the revised programming made them larger factors...and there are a variety of them. Sort of like being more susceptible to a cold if you go outside without your scarf, but the results depend on the weather, how long you are outside, and what you ate for breakfast. If that is the case, we may never have a real firm answer. That will be sad! I think we have to prepare ourselves for that possibility, however. Even the most transparent corporation in the world can't tell us the cause if they do not know for certain.
There is a lot of truth in what you say, but remember that they said similar things at the advent of the internal combustion engine. Such things are generally inevitable, and we must adapt. A "Get a horse!" attitude makes the world stand still. We say we want technology, but only in limited amounts. That is not really practical. Either the world turns...or it stops altogether. We can lament it, or we can move on.
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