Dear laissez-faire capitalists

What's wrong with practicing law or medicine without a license?

Uh... I'm not a laissez-faire capitalist.  No one who really understands economics is.  But I do believe that the certification and licensing of professions is an authoritarian tactic used to restrict competition, control employment, and establish market control.   I understand that the intention is also to create and maintain a "professional standard", but they go too far.  There have been many distinguished auto-didactic lawyers in history(hello! Abe Lincoln), but it's impossible to take the bar now without paying 60K a year for three years in an "accredited" law school(except in CA).  And I'm not even gonna get into the rigors of getting a medical license.  I will say that I know god damned well that I have seen many uncredentialed people medically treating people, and helping them a great deal. 
As with everything else in life, caveat emptor.  You can't rely on others whose agendas are concerned with much more than your personal best interests.