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.
The Recorder in general isn't a bad instrument, though. If you hear a flute from the Baroque period, it's most likely the Recorder. It requires sophisticated technique, but since it's cheap to make, teachers use it as a teaching method without even knowing that they use the tongue to stop their breath, or that air pressure varies depending on the pitch being made. Also, there are many types of Recorders. What the children use are Soprano recorders, which have a high pitch (duh).