After somebody spends 4 years or more learning their specialty in college combined with hands on application along the way and afterwards, they're pretty much qualified to perform in their specialty area, and continue to develop their skills as they work. Some stupid certification exam administered by the State certainly doesn't make them 'better' at what they do...it just gives the government more control and revenue in the forms of licenses and fees.
I have a good friend who has a B.S. in Spanish,a Master Degree in English and a Law Degree. He had to go back to college for another year to take courses to get a "Teaching Certificate".
