Most of those new to cryonics, and many beyond that, make one or more of several common errors that can be fatal.
In broad, these are:
1. Over-simplification. The problem is not just to "find a cure for the cause of death" but goes much beyond that, with several challenges including especially repair of the damage caused by the freezing or vitrification process.
(I find a strange contradiction in Melody's statement that(a) she was intrigued by the possibility of inference of a person's details from his imprint on the universe, yet (b) finds little hope for patients not given the best possible current treatment.
Giving any degree of credence to (a)implies nearly unbounded hope, as in the speculations of Mike Perry and others.)
One might think that understanding the complexities might discourage potential recruits even more, but that is not the case, because such understanding inevitably reveals the hope as well as the obstacles.
It is also over-simplification to imagine that even sharp improvements in technique will result in immediate and major acceleration of growth. After all, many people believe that dogs have been revived after freezing, but they still aren't interested. And there are millions of millionaires in the USA, for whom funding cryonics would be no hardship at all, but only a tiny fraction of them are interested.
2. Ignorance of probability theory. One aspect of this is the willingness of lay people to accept as gospel the lying statements of "experts" such as Arthur Rowe that the odds against revival are extremely adverse, probability of success being zero or close to it. No such "expert" has ever, to my knowldege, displayed a calculation of probability to support such insolent assertions.
Another aspect is the failure to understand the math of gambling. The "expected gain" of a win/lose gamble is the probability of winning multiplied by the payoff if you win. One of the problems here is the difficulty of quantifying the value of future life, but for many people the value of indefinitely extended life in youthful good health is so large that even a small chance of success would be worth a lot in present coin.
On the CI web site (cryonics.org)I have laid out the case for cryonics in a framework of probability theory. As it happens, I know more about the foundations of probability theory than most scientists, including most mathematicians.
3. Ignorance of the cryobiological literature. There are many available citations showing remarkable preservation of structure, and even of function by various criteria, after preservation of human and other mammalian brains, even after many hours of warm ischemia or/and straight freezing.
4. Plain irrationality or submission to conditioning. This overlaps other problems but also deserves stand-alone attention. The essence is in a quote from Dostoyevsky: "Men prefer peace, even death, to freedom of choice in the knowledge of good and evil." In other words, it is common to hate responsibility and effort more than failure or even death. This is evinced most obviously in the very slow decline of smoking or the very common failure to save money. But while human stupidity is formidable, it is not invincible. We have to some degree overcome all the obstacles, with recruitment growing more rapidly in recent years.