You obviously do not live in NYC. When the national proficiency exam was administered several years ago to newly-hired teachers, more than half failed. They remained on the job and remain on the job today.
News accounts at the time reported that a large percentage of NYC teachers (some estimated up to 40%) were not only uncertified, but uncertifiable.
Today, if you admininstered the 1960 NYC teacher certification test to working public school teachers, how many would remain on the job? At that time a NYC certification was recognized in every public school system in America.
And today...???
You are correct: Leda most certainly does NOT live in NYC.
Nope, I do not live in NYC, never have and never will
live anywhere in the state of NY.
My point is this, my "typical" colleague is, and has been,
highly qualified. Using your logic, the entire teaching
profession is highly qualified.