I have not had good experiences with doctors. More often than not, I have experienced doctors' being wrong about my health status, and recommending treatment that ultimately does me more harm than good. How could I trust that same class of people to make as important a decision as this, knowing it'll be luck of the draw which one I get the day of some fateful accident? Even if I can name the person finally responsible for authorizing taking my organs, they're going to be doing it trusting the judgment of whichever doctor happens to be on shift.
We also can't know if--and if so, how often--they get it wrong. As the author mentions repeatedly, we can't know when "brain death" is "real death," or whether the medications given to preserve organs prior to cardiac death actually cause "real death."
It's the most important set of dice I can possibly roll. How can I make that bet? How can I bet that these people will accurately assess when I'm dead, even if I were to remove potential conflicts of interest from calculation entirely and grant that they were purely well-meaning? Even if the chance of being wrong were miniscule, the consequence to me of being on the wrong end of it is total.
I wish we could find a way to revive organs after death rather than having to keep them in a quasi-alive state. I would love to donate parts of myself so other people can live, after I'm done using them to live.
After.