Anger seems to be existing so to get the emotional level out of the way: I'm not attacking you. I think you're cool and I like you. I'm not accusing you of not being a perfect philanthropist, or saying that if you're not one then you deserve blame.
I admit the argument is personality-dependent in an ad-hominem-ish way, but since I got upvoted I think I'm not exclusively being an asshole here. It goes like this: If you're the kind of person who usually takes altruistic opportunity costs into account, then it makes perfect sense that you'd care about that of cryonics. If you're not, then it's more likely than you're saying "VillageReach beats cryonics", not because you tried to evaluate it and thought of altruistic opportunity costs, but because you rejected it for other reasons, then looked for plausible rejections and hit on altruistic opportunity costs.
Would a perfect philanthropist see a dentist, drive a car, and watch movies? Yes, probably and maybe. But the algorithms that Rain and MixedNuts use to decide to watch a movie are completely different, even if they both return "yes". Rain asks "Will this help me make and donate enough money to offset the costs, and are there any better alternatives to make me relaxed and happy and generally productive?". MixedNuts asks "Is this nifty, and will movie geeks like me better if I watch it?". I can claim that watching movies makes me more productive, and it'll probably be true; but still as a matter of fact it's not what made me decide.
Is it possible that a perfect philanthropist would buy shiny stuff and expensive end-of-life treatments but not sign up for cryonics? Yes. For example, they could have tiny conformity demons in their brain that make them have to do what society likes (either by addiction-like mechanisms or by nuking their productivity if they don't). Since cryonics is weird, the conformity demons don't demand it, so the money it would have cost can go to charity. But that's still a different state of mind from obeying the conformity demons without knowing it.
Conversely, there are possible states where you don't usually care about altruistic opportunity costs, but start doing so for cryonics for strange reasons. But it's still an unusual state of mind, and if you don't say why you're in it it's going to prompt doubt about whether it's your true rejection.
Also, the reason I was a snappy jerk is that I've heard the argument a lot before. Standard arguments happen over and over and over (I should know, I read atheist blogs), and you've got to be willing to have them many times if you want an idea to spread; but I'd prefer Less Wrong to address the question once and move on, with the standard debate rehappening elsewhere.
I'm not sure what your argument about the mainstream is. Is it "Lots of people have this objection a lot; they wouldn't if it sucked", or is it "Yeah, this objection sucks, but boy do you ever need a reply that doesn't make you sound like a complete asshole"?
Thank you for the calm, insightful response :)
I'd prefer Less Wrong to address the question once and move on, with the standard debate rehappening elsewhere.
If someone had linked me to a "one and done" article, I'd feel a lot more confident that this is a standard argument with a good/interesting answer. Instead I mostly got responses that seemed to work out to "I'm not a terribly nice person so it was simple for me" and "you're not a terribly nice person so it should be simple for you".
If there is a "one and done&quo...
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: