In the past, this was possible for only a few diseases, but groundbreaking discoveries in the last six months are opening doorways for 'early warning' for devastating diseases. As always, context is vital. The young man has a friend whose younger sister died of Rhett s Syndrome and he himself has an autistic brother. I would never minimize what demands this makes of parents and siblings and neighbors and friends. The former is seemingly much easier and certainly more in consonant with the way many people are taught to think.
Life is so much more than utilitarian rationalizations.
Providing loving and selfless care for people whom some regard as burdens may be the most rewarding and truly human actions we ever take. We fall ill. We grow weak. We become disabled. A day comes when our need to receive from our fellows adds up to far more than our ability to give in return.