EDIT: A lot of you are reading into the tweet while still somehow agreeing with the overall message. No one is saying we should eliminate music programs or that we should teach toddlers about healthcare plans. The tweet is making this thing called a --checks notes-- joke, that also conveys the message that schools could teach more practical skills that young adults will need going forward.
When I was in school, that was just the first song they'd teach us on the recorder so I assume it's meant to be the teacher pushing on with the lesson instead of listening to the student.