Why are some of you acting like this is completely new information and filler? We knew about the confusion already as Mc mentioned it in the first chapter and we knew his friend as she's been a few chapters before. At most, we got some new info and a different perspective.
From a story perspective, this moment is important as it either starters him thinking about how he's different from other people or contributes to the differences he has noticed his self. This also gives more characterization to the MC and his friend.