A General Practitioner doctor deals with all health ailments. as a consequence they are not trained to be experts in all health ailments; they are trained in the first steps of dealing with all ailments (which is a difficult endeavour).
I made up the 200 hour figure, but if you consider one subject for one semester of university is expected to cost 150-250 hours depending on the details. Let's say I underestimated 200 and actually it's more like 4-500 hours reading up and understanding everything about one molecule to overtake the knowledge of health professionals.
A General Practitioner doctor deals with all health ailments. as a consequence they are not trained to be experts in all health ailments; they are trained in the first steps of dealing with all ailments (which is a difficult endeavour).
That's a defense for the claim that doctors aren't experts at everything. It's not evidence for that claim that doctors are very good at general health.
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