Albus is just damned and determined to go down in flames, isn't he.
His way or the highway, and his view of the wizarding world, or the world be damned.
I am surprised that he hasn't detected Harry's attempts at draining his magic. Monomania, perhaps?
I recall a guy named Becerra in the navy.
He is rather single-minded, isn't he?
In that he is very much like Voldemort...but with better press.
He hasn't detected it because it hasn't happened. That happens next chapter.
Tune in next time...