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I see people spending money for a chance at an afterlife they have absolutely no proof of.There is a casual, down-to-Earth, no-supernatural-powers-required, fully constrained to known laws of physics and mechanisms of biology chain of reasoning that this could work. There's a huge qualitative difference between this and believing in God.
Sure, we can argue whether or not it's worth spending money on right now; if you start including things like "burden on your relatives" or "probability of undesirable future" or "probability that current preservation techniques destroy too much information" in your calculations you might end up deciding it's not worth the cost yet, but it doesn't change that the idea is sound in principle.
> I see vast exaggeration of some anecdotal observations (miracles?) as "knowledge" of life.
Are you calling modern molecular biology, chemistry and information theory a bunch of "anecdotal observations"? Sure, whatever. But even if, it's still the best thing we have to reason from.
> I see people finding comfort in an unknown future predicated on the powers of some super-human entity (at least super-human compared to the present) and on the optimistic belief in the benevolence of that entity.
You're bundling two different concepts together (which might be excusable, because people who believe in cryonics also often believe in superhuman AIs). Still, cryonics does not depend on any super-human entity or its values, it only depends on whether or not we crack nanotech (or some other technology we don't know yet).
> In short I see religious texts and religious arguments, hence: religion.
Where you see religion, I see reasonable assumptions based on current scientific knowledge, extrapolated by applying cold, hard rationality.