You cannot pre-screen for whether or not someone will be affected by receiving a report that they are 68% likely to die by heart disease in the future. That's illogical and quite frankly insane.
Many people will have enough of a self-conception – like the author of the post to which I replied – that they will have a fairly accurate idea of how they'll react.
Any many "in the middle" might, by considering, rehearsing, & precommitting to moods/strategies beforehand, helpfully prep/prime themselves to more-calmly handle whatever probabilistic results come back.
Those too concerned, by their own self-knowledge or that of experts/pretests, can skip the risk of "knowing too much" via an elective test, while others can proceed, knowing the risks, with informed consent.