I don’t think the two things are related at all, and a doctor who thinks that is a poorly educated one IMO.Biases? By and large, African Americans ARE stronger and more athletic than whites—they’re faster too. Comparing pro and college rosters with demographic data from the US easily tells that story.
Interesting theory that this might drive doctors to believe they have a higher pain tolerance.
Kidney stone don’t care what color someone’s skin is.