>>13028234Gonna have to play the devil's advocate here.
Smoking causes cancer, periodontitis etc, but actually prevents neurodegenerative disease.
DDT works it's just bad for the environment, it is still in use today in all the third world.
Heroin obviously works as a pain medication, there is just a subset of the population who have a genetic propensity towards addiction and can not use any opioid.
Asbestos has never been proven, even though there has been extensive scientific inquiry, to be a hazard in houses for the inhabitants. It has been proven to be bad for the people who mine and process it, as well as in boats for the sailors.
Coffee has gone the opposite direction, being typically reviled as a dangerous substance, but proven to be healthy when consumed in moderation (2-3 cups daily).
