If I, as a 22-year old in very good health, were to be frozen right now, I would be sacrificing a large portion of my initial life. If I were 77 in good health, I might be looking into methods to get myself frozen so as to avoid having my body fall apart.

That is, the expected utility of freezing and revival varies widely, distinctly from the wide variation of expectations about the possibility of success or the financial impact.

So my agreement or disagreement would hinge on the demographics of the reference class. (In addition to my beliefs about cryonics AND my beliefs about medicine vs. charity)