GR translation: The humiliation would be good for the boy

[Mike Jing]

V95.30-35, 97.24-30   “Perhaps,” he tells her, “I will cut your hair.” He
smiles at Gottfried. “Perhaps I’ll have him grow his.” The humiliation
would be good for the boy each morning at quarters, ranked with his battery
near Schußstelle 3, where horses thundered once before the frantic, the
losing railbirds of the old peace—failing inspections time after time yet
protected by his Captain from Army discipline.

Does the humiliation come from failing inspection because of his long hair?
And why would it be good for him? Isn't it just for Blicero's satisfaction?