Yeah but you don't have to be interested in someone to be willing to help them when they're injured, and the whole chick affinity is inclined towards the mc being a goody two shoes boy scout so this would be in character to help her. Just imo.
and HE does, offer to help her regardless of affinity, and whether she accept it or not is where to her matter MC's "personality"
you as the player have the option to choose to help her this is not about MC being chick and therefore a "good guy" so he must help, but that Quinn simply not liking the player's character if he dont have Dik affinity.
it is realistic , you simply don't like somebody you don't want his help, and tell him to mind his own business.
and that is what happens here, Quinn simply don't like you and don't want your help