And introversion can be a wonderful asset in some professions as well.
However, I do agree that conscientiousness is probably pretty universally better.
A highly extroverted person isn't going to make for a better overnight custodial worker than someone who prefers a more solitary lifestyle.
An actor who can tap into the emotional currents of high neuroticism in their work can offer a more sincere and authentic performance than an emotionally flat one.
Low conscientiousness correlates with risk taking and can be an asset in roles where over-planning to the detriment of acting can be costly - think firefighters.