wiping out Hermione as “a Light-side witch showing skill at military command and Battle Magic”, well, it was obviously not enough of a consideration to keep him from making Hermione a general in the first place [...]
It gets better if you think of it as make use of the powerful witch to level-up Harry, then get rid of her before she’s a problem and make do it in a way that brings all the advantages you quoted.
It gets better if you think of it as make use of the powerful witch to level-up Harry, then get rid of her before she’s a problem and make do it in a way that brings all the advantages you quoted.