Cryonics feels like a choice again, and for me this is a moral choice -- perhaps a deontological one. I am willing to hear a variety of moral solutions/arguments, I just think this is something that needs address.

You seem to be thinking as if a person dies, and then cryonics is a way that can maybe bring them back to life. It is more accurate to say that a person loses the capacity to to sustain their own life (and experience it), and cryonics is a way to keep them alive until potential future technology can restore their ability to sustain and experience their life.