And don't forget, Hermione was Mr. and Mrs. Granger's biological daughter. No matter how close Harry was to the Granger family, at that time, he was only an adopted son!
The more Harry clashed with Hermione, the more rebellious she would become, and he would gradually lose Mr. and Mrs. Granger's support...
So, in that situation, aside from hastily settling on the plan of "going to school together and looking for a chance to withdraw later," did he really have any better way to immediately change Hermione's mind and stop her from attending Hogwarts?!
Go to Scamander... Heh. It wasn't as if Harry hadn't invoked Scamander as backing at the time, but hadn't Hermione still stubbornly insisted on her own views?
And what happened later proved that even after Hermione learned who was standing behind Harry, she had still accepted Dumbledore and Hogwarts based on her first impression, rather than accepting Scamander's suggestion that she drop out halfway through...
"So, Headmaster, can you tell me who that messenger was back then?" Harry asked coldly.
"Harry, he has already graduated from Hogwarts, and at the time, he was merely passing along information at my request. I do not wish for you to continue investigating..."
"Heh, I never intended to investigate in the first place." Harry snorted with faint mockery. "I only wanted you to admit that you were behind this as well~"
"Yes..." Dumbledore let out a helpless sigh, his face visibly darkening.
He could no longer remember how many decades it had been since he had spoken so much at once...
And in the end, he had been left flustered and speechless by the rebukes of a child.
At that moment, Dumbledore truly felt a powerful urge to use Legilimency on Harry.
But when he saw the thread of Obscurus