The person may not believe that MWI is true; the beliefs were stated as being conditional.

Nevertheless, your argument does apply to me, since I have similar beliefs (or at least worries), and I also for the most part buy your arguments on MWI. I do plan to sign up for cryonics within the next year or so, but not at any price. This is because I don"t expect to die soon enough for my short-term motivational system to be affected.