Sure, if you leave out the much longer history and ignore that it was substantially leavened with good faith efforts to restore health, arrest decline and reduce suffering, a substantial number of which also succeed.

(As for "until very recently" -- flagrant abuse still happens in medicine, that's not a thing that recently stopped happening. What I'm saying is that this simply means medicine isn't special as an endeavor... whereas cryonics seems to have little to show for it other than that some bodies are, in fact, vitrified or just garden-variety frozen, depending, many of them even standing a good chance of being reasonably intact after going through the handling process. There's such a vast asymmetry between the two fields; if they were really that comparable, most doctors would be this guy.