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.
The rest of our brains are wired to give close-enough approximations quickly, not to reliably produce correct answers (cf. cognitive biases). It's not a given that any coherent defition of ethics, even a correct one, should agree with our intuitive responses in all cases.