If you think broad skepticism or criticism of a scientific study based on class characteristics is admissible (some statistical investigations are poorly conduc

If you think broad skepticism or criticism of a scientific study based on class characteristics is admissible (some statistical investigations are poorly conducted, so this one might be poor too), why not trust based on class characteristics (scientific articles in Nature tend to be really good, so this one might be good too)? You're right, I don't think either of these options is better than the other.