IIRC McGonagall does say something similar in the book. The movie just leaves it out. Harry asks if she could sign it, and she says something along the lines that she can’t, because she’s not his guardian, and she also wouldn’t anyway because she doesn’t think he should leave the grounds.
Honestly, it goes with the poor writing that she says it too. She really hammers in the point that he’s supposed to be scared of Black, because she doesn’t trust the reader to remember it for the twist I guess.
IIRC McGonagall does say something similar in the book. The movie just leaves it out. Harry asks if she could sign it, and she says something along the lines that she can’t, because she’s not his guardian, and she also wouldn’t anyway because she doesn’t think he should leave the grounds.
Honestly, it goes with the poor writing that she says it too. She really hammers in the point that he’s supposed to be scared of Black, because she doesn’t trust the reader to remember it for the twist I guess.