While the people who would keep you on dry ice for two weeks obviously are.
Um... no? I seem to recall questioning that choice elsewhere on this thread and giving partial support to another (MichaelAnisimov) who claimed in colourful terms that it is a critical failure.
You are making classical crackpot excuses to handwave away expert knowledge.
No I'm not. I'm disagreeing with you about which people are experts. You are not an expert at choosing appropriate experts to defer to. You are appealing to absurdly irrelevant authority. "Expert" status and prestige is not transferable across domains. Or at least it shouldn't be for those who are interested in attaining accurate beliefs.
I don't think there is any productive way for us to continue this discussion.
Obviously not. Our disagreement about how how rational thinking works is rather fundamental, with all that entails.
In the past, the Cryonics Institute has had a policy that said that they would not accept anyone who is not a member. This has changed. The policy now is that someone who has full legal authority over your body can sign you up after you die. It costs $36,250 to be frozen if you are not signed up, which is more expensive. They also will not do anything until you have been on dry ice for 2 weeks after they have been contacted, so not being a member is more risky.
This is very important news for anyone who is currently cryocrastinating. It means that you can drastically increase your chances of survival without filling out any forms. All you have to do is tell a loved one you want to be frozen upon death, and that you would like them to take responsibility for making sure this happens. This takes literally 30 seconds. Do it now!
This news might also be a reason to not sign up right away, if you think something better (like radical life extension or uploading) will come along in your lifetime. We should discuss this in the comments.
Edit: The general consensus of this discussion is that this is a really bad reason not to sign up for cryonics.