I think ortho attracts people who were interested in engineering and finance. Personally, I came in with a background in finance, so if medicine didn't work out, I would have likely gone back to finance. Lots of ortho guys majored in engineering too.
I'm not surprised that the numbers are low. Most of us who went into ortho didn't want to manage a patient with 12 comorbidities and no dispo, while trying to figure out how to titrate their insulin or find an SNF. If ortho didn't exist, I would be one miserable bear right now in medicine.