Try diagramming Mia’s argument. It’s a core part of the argument, it’s just left for the reader to imply. At best, this was done because Mia assumed the reader would be intelligent enough to connect the dots. At worse, it’s a mott-and-bailey argument, pulling the old Charlie Kirk trick of heavily implying something (to the point of being a core part of an argument), and then pretending offense because “I never said that.”