That’s only a legal formality, though. Harry hates the wizard society and wouldn’t use its laws against her, and he’d discourage others from acknowledging it.
He’s just (ab)used the laws of wizarding society to get Hermione out. I can certainly imagine him using his position over her if it is useful for solving the next crisis he has to deal with.
Also, Harry has a dark side, it might also do things.
The laws of Wizarding society are, broadly speaking, insane.
There is a vast gulf between twisting or breaking a rule that makes no sense and violating the trust of a friend like Hermione.
He’s just (ab)used the laws of wizarding society to get Hermione out. I can certainly imagine him using his position over her if it is useful for solving the next crisis he has to deal with.
Also, Harry has a dark side, it might also do things.
The laws of Wizarding society are, broadly speaking, insane. There is a vast gulf between twisting or breaking a rule that makes no sense and violating the trust of a friend like Hermione.