[Dylan16807]

Doesn't the guy in Gattaca probably have a heart condition? Science can definitely tell you that you're in a group that will probably die upon doing X.

Gender and race moreso are lousy predictors for most things, but they're not useless.

[jorgis]

All science can tell you is that if x people with your condition do y, n of them will likely die. Neither you not the statisticians can say with certainty whether you're in group n or x minus n.

[Dylan16807]

But sometimes x=n. And sometimes x is pretty close to n and you should listen to the doctor unless that alternative is truly unacceptable to you.