One can put oneself in a low risk population by making healthy choices, but that population still has a probability of getting cancer associated with it. The ri

One can put oneself in a low risk population by making healthy choices, but that population still has a probability of getting cancer associated with it. The risk can be inherent (you can be very healthy but with brca mutations a women will have something like an 85% probability of having breast cancer by age 45 I believe). You may also live near a gen-x dumping factory and not be aware of it, and then there is just the dumb bad luck of having errors during DNA replication and subsequently in the DNA repair mechanisms.