Not calling them a liar or an idiot.
If we don't call spades spades, then we'll slowly be inundated with liars and idiots, won't we?
The fight with Vitto and Madrigal and the fight with the ghouls are two distinct scenes. There's a chapter break and everything.
There's no 'chapter break' in the action, no period where Harry can compose himself. It's all one long conflict. The fact that it occurs across chapters is totally irrelevant - the break doesn't exist within the story, it's an artifact of the story being written out in novel form with a particular structure. The spells Harry casts before the battle aren't part of the analysis, because there's a period of speechmaking and talking that would obviously provide a chance to catch one's mental and physical breath. No such period occurs within the battle.
Just a little while ago we had people discussing a proposed rule that would let people clear their stress tracks in the middle of a conflict, and it was rejected with the reasoning that only one published ability permits that, and it's the Blood Drinker feature
A Taste of Death - which requires completely draining a human being. It also banishes a mild consequence, admittedly.
Arbitrarily declaring that there are sustained pauses in the middle of a massive battle is worse than that proposed rule.
The game is not a hard-nosed, exacting simulation of every detail of the series. It is a game, meant to reflect the feel of the books as close as possible while being playable and fair.
The rules do not permit us to enact the most dramatic sections of the stories! These are not minor trivial details. By these rules, Harry Dresden would have taken himself out with stress and lost the major conflicts in each novel. How does that reflect the feel of the books?
For that matter, what's supposed to be playable and fair about limiting players to so few spells? I don't see much interesting about rendering your character unconscious, or worse, because you cast a minor spell multiple times. It's not a part of the stories at all.