As you'll see if you read his text, he's responding to proposals to emulate a brain without understanding how it all works, and is noting just how fine you'd need to actually go to do that.

If you want extremely accurate synaptic and glial structural preservation, with maintenance of gene expressions and approximate internal chemical state (minus some cryoprotectant-induced denaturing), then we absolutely can do that, and there's a very strong case to be made that that's adequate for a full functional reconstruction of a human mind.

I've heard the case made at length, but not of, e.g., a C. elegans that's learnt something, been frozen and shows it stil remembers it after it's unfrozen (to name one obvious experiment that, last time this precise Myers article was discussed, apparently no-one had ever done) or something of similar evidentiary value. Experiment beats arguing why you don't need an experiment. Edit: Not the last time this Myers article was discussed, but the discussion of kalla724's "what on earth" neuroscientist's opinion on cryonics practice.