Commercial cigarettes have only been produced in such mass quantities since the industrial revolution made the production process automated. Maybe it has been some one hundred years? So in effect if you are a numbskull and believe that there have always been just as many numbskulls as you it cannot be true. At least not to the degree that you are a numbskull today!
And if you know you would give birth to a numbskull you would indeed be pro-life in the hope that you could take someones baby who is not a numbskull?