[RandomBK]

Accountants, lawyers, and doctors all have associations who set professional standards they must abide by. They often also owe you a higher duty of care than someone in i.e. marketing or sales.

I still see where op is going, but accountants, lawyers, and doctors aren't the greatest counterexamples to use here.

[staticautomatic]

Sure they are. There's plenty of variation in quality among people in those respective fields, just like every professional field.