I might be misunderstanding where you're coming from, but presumably the concern isn't for medicating the anxiety, it's for the prevalence of anxiety itself. If

I might be misunderstanding where you're coming from, but presumably the concern isn't for medicating the anxiety, it's for the prevalence of anxiety itself. If there's a novel high incidence of anxiety across the population, how is that _not_ interesting? Is the concept of concern for other people really that alien to you? Hell, even if we stick with your model of "why would I ever care about another person's well-being", understanding that anxiety is apparently so common can help an individual better understand where his anxiety is coming from (eg perhaps weighting universal factors more heavily than personal ones).