What you describe is matter of selection bias: in fields as crowded as public health and medicine, experts voice all sorts of advice, citing all kinds of resea

What you describe is matter of selection bias: in fields as crowded as public health and medicine, experts voice all sorts of advice, citing all kinds of research, and often contradicting each other. At the end of the day, we regular citizens usually hear from those experts that got their voices amplified by operators of platforms (journalism, political institutions, etc.). In Robin's terms, the elites choose from the crowd of experts those that they like the advice the best.