OTOH, there were, as recently as a few months ago, ads in Toronto's subway system exhorting people to go to the doctor if they found blood in their urine. And t

OTOH, there were, as recently as a few months ago, ads in Toronto's subway system exhorting people to go to the doctor if they found blood in their urine. And this is in Canada, where there's no financial barrier to going to see your doctor for "maybe it's nothing"-style ailments. I fear you might be overestimating the average person.