Fixing paradox is entirely seperate from everything else, and must be taken care of. (We don’t know the consequences, but they are presumably serious). If Harry triumphs here, and Voldemort has already arranged for that note to be sent, then fine. If Voldemort hasn’t, then Harry has to take care of it himself.
Or that Harry then forges Quirrel forging his signature.
Then the whole thing is precisely arbitrary, reaching and surpassing Bill And Tedd’s Bogus Journey levels of fakeout.
Nah, that would just be ‘I stole the keys after all’ Bill and Tedd’s Excellent Adventure level of fakeout.
Fixing paradox is entirely seperate from everything else, and must be taken care of. (We don’t know the consequences, but they are presumably serious). If Harry triumphs here, and Voldemort has already arranged for that note to be sent, then fine. If Voldemort hasn’t, then Harry has to take care of it himself.