I dont really see how Inasa is gonna get tired via ragdolling. His quirk can be used largely and casually, where it doesnt exactly exert physical strain, meanwhile ragdolling would wear Yang out quicker and she wouldn't be conservative with her aura seeing as she needs to build up damage.
Inasa has extremely high precision as stated by one of the examiners that arc, and really he only failed due to personal issues with Todoroki and he fact his fire made the wind manip unstable.