For example, smokers likely purchase more lighters than non-smokers so there should be some correlation between lighter purchase frequency and lung cancer. But we all know you can't get lung cancer merely from buying lighters.
I’m talking specifically about the claim that because individuals with a low exposure to something don’t necessarily have a given outcome, there is no causal pathway between the exposure and the outcome. It’s not clear to me how what you’ve written speaks to anything regarding that claim.
Not trying to be snarky, I just want to be really clear about the point I’m trying to make here.