I put this phrase in my "never use" list along with "user friendly" and "it's in the mail".
It's the most offensive thing you can say to a K-8 teacher who willingly forgoes a higher paying career because they believe teaching K-8 is the most important job around.
It's the most offensive thing you can say to that retired [Boeing, Lockheed, Raytheon, NASA, whatever] engineer who willingly teaches K-12 to inspire the kids and show them that the world is not owned by the MBAs and the World Bank.
And you insult all the CFIs who do know what they are doing, who are not there just to reach 1500 hour so they can leave.