I agree with what you say, but the rest of the discussion could go essentially unchanged if the line
Yes, definitely, if a few plausible assumptions turn out right.
were replaced with
"Perhaps, my best estimate of the odds are 1% or so"
(which would be my response in an analogous discussion)
I think that what seems to me to be the main point of the dialog,
"And what disease is this that you can somehow fight with a $28,000 necklace?"
Mortality.
"But ... but ... that's not a disease!!!"
Looks like someone gets tripped up by definitions a little too easily...
is fairly insensitive to a wide range of possible odds for cryonics working.
From Mike Darwn's Chronopause, an essay titled "Would You Like Another Plate of This?", discussing people's attitudes to life:
Conclusion, graphs, and references in article. As usual, I recommend reading Chronopause.com as Darwin has many good articles; to quickly link a few: