Around here (public/socialized/“free” European healthcare system) doctors are known to be paid poorly, unless high-tier specialists, so maybe you’re over-assuming.
Well, sure, in Europe it's different but the original topic was about Facebook, which is headquartered in the US. The idea was that high payment is because the job is undesirable and has bad reputation. This does not seem to be true, as many reputable and desirable professions in the US have high salary, including doctors.