Re: Cryonics is a LAST ditch effort AFTER....

You could logically come back to life on CPR without your brain being any good... Whereas cryopreservation means your resuscutation happens with the aid of advanced nanobots. You could be "alive" by cardiorespiratory standards but "dead" by neurological standards.

The whole point of cryonics is to try and preserve people while they are alive by neurological standards. Failing that, information-theoretic standards (which are a continuation of the same idea). In either case they don't want to risk all that information being erased and letting the individual simply die. Freezing a corpse or a mess of spare parts is not the plan.