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same thing happens in engineering and techincians fields. I have had coworker I wouldn't trust with a screwdrive near me and ones I would trust to fix or build anything.
An MD seems like a really intense technical/trades degree.
I work in an operating room, and I have colleagues who I’d allow to dissect brain tissue with full confidence that they are the right person for the job who I wouldn’t trust to make me a peanut butter and jam sandwich.