You'd need reliable statistics on the average number of lives saved per organ donor. If it works out to 0.1 then I wouldn't accept that reply, no.
This seems to assume that the probability that someone will be eventually successfully revived given that they have signed up for cryonics is >10%.
My girlfriend/SO's grandfather died last night, running on a treadmill when his heart gave out.
He wasn't signed up for cryonics, of course. She tried to convince him, and I tried myself a little the one time I met her grandparents.
"This didn't have to happen. Fucking religion."
That's what my girlfriend said.
I asked her if I could share that with you, and she said yes.
Just so that we're clear that all the wonderful emotional benefits of self-delusion come with a price, and the price isn't just to you.