I think it’s important that this comes just a few chapters after Dumbledore regrets resenting Harry for having spent his fortune to save Hermione, when he (Dumbledore) chose not to do so to save Aberforth.
“I—I’m sorry, Harry—I—” The old wizard pressed his hands to his face, and Harry saw that Albus Dumbledore was weeping. “I should not have said, such things to you—I should not, have resented, your innocence—”
I think it’s important that this comes just a few chapters after Dumbledore regrets resenting Harry for having spent his fortune to save Hermione, when he (Dumbledore) chose not to do so to save Aberforth.
(Ch. 84)