On a population wide evaluation, you are correct. However, some people are just more susceptible. It's complex, but if you just take a simplistic view of a single gene becoming cancerous, some people are only 1 mutation away and others are hundreds.
Start with "it's complex" and "some people are just more susceptible" and you have a great platform for arguing against eg. banning lead-additived gasoline.
Then add the shifting away of blame from industry and corporations to individuals, sprinkle some "focus on what you can do" (eg. the "ban plastic straws" type useless token-gesture) or "it's that little things" and you get exactly the kinds of stuff industry is currently gaslighting us with, distracting us from high-impact but profit-lowering big measures that could be implemented instead!
Nuanced thinking can be weaponized against you just as well as black-and-white oversimplification...