[gruez]

Your quote missed a few crucial words. The claim was that "every person exposed to it over the course of a full lifetime would be expected to get cancer".

Suppose you get a bunch of people to flip 3 coins. You'd expect the average person to get 1.5 heads, but it would be inaccurate to say "every person would be expected to get heads".

[fatfingerd]

Every person can mean considering each individually. The bigger problem is screening every person for a cancer their doctor should expect.