If a doctor, lawyer, or dentist had 40 people in his office at one time, all of whom had different needs, and some of whom didn't want to be there and were causing trouble, and the doctor, lawyer, or dentist, without assistance, had to treat them all with professional excellence for nine months, then he might have some conception of the classroom teacher's job.

Quinn’s comparison reframes teaching as a high-stakes profession whose difficulty is often underestimated because its labor is dispersed across many students at once. By invoking doctors, lawyers, and dentists—occupations culturally associated with expertise, authority, and compensation—he highlights the asymmetry: teachers must deliver individualized, professional-quality service to a large group simultaneously, including unwilling or disruptive participants, and sustain that performance over an extended period. The nine-month span underscores that teaching is not a single transaction but a long, cumulative process of instruction, management, and care. The quote functions as a defense of teachers’ professional status and a critique of simplistic judgments about classroom work.