Behavioral sciences is one of the easier subjects to grasp and is not taking seriously by the international medical schools at all, but actually its not just for psychiatrists. You have to know when to spot a mental issue even as a surgeon in case a person is not able to consent properly to a surgery perhaps. Regular physicians prescribe more anti-depressants than psychiatrists themselves. Ethics aside though, if someone has to be taught what is right and wrong there is something fundamentally wrong with their upbringing in the first place!