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