As someone who's going to school to become a teacher, it did kind of bug me that Lily was upset she was "only" a Kindergarten teacher. As if only being a teacher is somehow a horrible thing.
That got my attention as well. It sort of stuck me as a "Manhattan elitist" kind of thing and seemed somewhat unnecessary.
It's one thing to peruse something you love, but to treat the most noble of professions with contempt is a bit silly.