The quote humorously questions the necessity of Mary Poppins' large bag, despite its magical ability to hold countless items. The author speculates that Mary initially desired a simple magic pocket, but was humorously denied by the wizards who instead provided her with an oversized purse. This reflects the absurdity of gender stereotypes and expectations, highlighting the playful frustration with traditional narratives.

This commentary not only entertains but also critiques the notions surrounding magic and femininity in storytelling. It suggests that magical solutions often come with their own peculiarities, and in this case, result in a comically oversized, yet "useless" solution for what could have been a simpler option.