Did this doctor also explain to you that a truly brain dead person cannot possible breath on their own? Once brain death occurs, often well before in traumatic brain injury cases; the person is breathing only through artificial respiration and their heart beating only through artificial means? The reason for keeping a brain dead person on artificial respiration and keeping their heart functioning through artificial means, after several doctors have declared the person dead for all intense purposes, is in case there is a living will or other legal designation that states the person is an organ doner and or gives the family some time to consider organ donation.
I have designated myself as an organ donor and I have absolutely no fear what so ever that my organs will be harvested from me while Im still functionally alive with any hope of recovery. And ziravan eloquently pointed out why organ donation is a good thing to do and what safe guards are in place to safe guard that those are merely unconscious or truly comatose and not brain dead are not harvested for their organs.
If Im ever declared brain dead or with a brain with all the functionality and cognitive ability of a baked potato, Id much rather be removed from artificial life support after having my organs and tissues go to someone in need as I have really no need for them anymore. I have no desire to have my dead brain and merely my body kept alive through artificial means to no other end other than just to keep my body, an empty shell of the person I was once was while alive, kept alive for or an undetermined time, weeks, moths, years, with great expense to my estate, and to my living heirs and for no good purpose.
If a person shows up in the ER truly brain dead and not breathing on their own then their organs will not be usable. If they are put on life support before they are truly brain dead we are back to the original question.
We humans are not as smart as we think we are. Here is a link proving why we shouldn't jump to conclusions, even educated ones: http://www.nytimes.com/2011/12/04/magazine/can-ambien-wake-minimally-conscious.html?pagewanted=all
with great expense to my estate, and to my living heirs and for no good purpose.
I guess it depends on who decides what a good purpose is.