It's even worse than that, because the way they extract the causal link is just a regex, so

"vaccines > autism"

because

"Even though the article was fraudulent and was retracted, 1 in 4 parents still believe vaccines can cause autism."

I think this could be solved much better by using even a modestly powerful LLM to do the causal extraction... The website claims "an estimated extraction precision of 83% " but I doubt this is an even remotely sensible estimate.