Respectfully, I disagree. I think the condition may be simple if looked at it from, say, a programming logic point of view. But given the costs involved, I think the other constraints are not noise: they're the signal needed to make the right decision.

Specifically, since you brought this up in the context of someone who will die of cancer, the tradeoff calculation must take into account that even if cryonics work (which is already a giant leap of faith right now), this person would also need science to advance enough so that a cancer that is terminal now will be somehow reversible in the future. Additionally, all the people he cares about would have to have survived too for this to matter. Again, this is all context, this is within the context of a dying person that says "Almost immediately I realised I just couldn’t do it. Life for me is about living, not just clocking up the years.". I don't think all of these extra constraints would be seen as noise by someone like him.