"I think people are just basically curious about their own mortality. If you ask people what they worry about, most people would say they are worried about dying."
Even if this test were completely accurate (and that's a big if), I wouldn't want to know. This is like IQ testing for me (again, leaving aside all the completely valid criticisms of IQ testing)—there are just some things I don't want put in such absolute terms. I know that once I found out, accurate or not, they'd always be at the back of my mind and I'd always be comparing my numbers to everyone else's. While this is clearly my problem and a reflection of my own insecurities, I don't suffer any disadvantages from not knowing these things and will continue not to know for the sake of my peace of mind.