As someone who has had some less-acute sports injuries, I'd also break the injuries down into "shit's really fucked up" and "you could conceivably walk it off" categories. The former, modern US medicine excels at. The latter, I'm not sure the doctors are even trained to treat something less acute and not requiring expensive surgery. In fact, I strongly suspect they often prescribe a surgery anyway, just to make a buck. I had to decline a surgery once.