I appreciate the canonicity of Himawari only being strong when roused by Sakurako. Akari and Chinatsu probably wouldn't have had a problem taking her 2v1, but because Sakurako was present she went into "vs Sakurako mode" a la the back hip circle episode. The continuity checks out.
That said I would’ve left after the first punch and had breakfast without her lol if anything surprised Sakurako wasn’t like “let’s eat all the best snacks” or go out on a morning walk/grocery store trip