I think that's a reasonable position. My desire for legalization is more around an edge-case scenario, because I think the "do it yourself" approach for most people isn't actually that difficult if someone is actually committed in the same way they probably should be to demonstrate sufficient consent and have it done by a government-licensed doctor, and so the bodily autonomy arguments aren't really persuasive.

The edge-case is that the person wants to become an early suspended customer of a cryonics organization. Already there have been successful suicides from people who stated they would have preferred to be suspended and have the very small chance of actually getting a second chance at some distant point in the future, but there are various legal obstacles as well as practical ones to that, and so these people are just as assuredly gone forever as anyone else.

Besides being complex, it's also an old issue. You might enjoy reading this case report from 1993 about a suicidal person who wanted to be cryopreserved: https://www.cryonicsarchive.org/library/complete-list-of-alc... He did eventually shoot himself, and unlike others there was at least a brain preservation in the end, but it's pretty far from an ideal one (and no one knows if even ideal preservation is good enough for future reanimation/emulation; I'd bet against it but obviously wouldn't rule it out). More recently, in late 2018 the first person was cryopreserved while using California's new end of life option act to hasten an otherwise painful demise from stage 4 cancer. (Short version: https://www.cryonicsarchive.org/library/complete-list-of-alc... Long version: https://www.cryonicsarchive.org/docs/alcor-case-report-a-199...)