While it likely was dehydration or electrolyte imbalance that killed my cellie, one cannot logically follow with "...and therefore it was not the actual withdrawals..." To do so would be analogous to proposing that actual AIDS doesn't kill, but rather the severe pneumonia or muscle wasting, what have you.
The fact is, during the zenith of a true high dose opioid withdrawal, dehydration and electrolyte imbalance are unavoidable, period. True, those two symptoms (arguably the most dangerous) can be ameliorated to a certain degree by constant care and supervision from medical staff qualified to administer said treatment, but the reality is that vomiting and excreting at the rate attained by some people (like me, for example) simply makes it physically impossible to maintain hydration and electrolyte balance, regardless of treatment. The body simply will not accept anything orally, and there is a greatly increased difficulty/decreased practicality of intravenous maintenance - not to mention that in jail such an option doesn't exist to begin with.
It's my opinion that the gross over-scrutiny and subdivision of so called "cause of death" is the exact problem when trying to convince your typical doctor that these WDs can kill. After all, the symptoms listed are directly caused by the cessation of narcotic intake, much like landing at terminal speed on a concrete surface could be a direct result of jumping from a tall building.
It's not the fall that kills, it's the landing? The car accident wasn't fatal, cause of death was severe blood loss and secondary damage from blunt force trauma?
By that logic, one can propose that benzo and alcohol withdrawals aren't fatal, but the seizures that occasionally appear in a withdrawing person do sometimes kill. Of course this is absurd.
Fortunately, doctors are more and more publicly acknowledging that severe opioid withdrawals can be fatal - in and of themselves. There is no pre-existing medical vulnerability required. Severe enough withdrawal can do the trick all by itself.
Sorry for belaboring the point, but the sight of the guy in jail with his arms crossed over his face, expression still twisted in obvious pain, fists clenched, shit stains all over the sheets, other unrecognizable fluids everywhere...this coupled with the recollection of how his whimpering just sorta faded out the night before and me thinking, "...thank God he finally fell asleep and shut the fuck up..." drove the point home to me forever.