I can see a slightly different take on this that might better match what the QMs might have been feeling:
"Even though Hazou has gained the skills needed to be competent in social situations, he has not integrated those skills into his lifestyle as passive tendencies, and must consciously call upon them. Furthermore, he must be in an appropriate mental state to call upon them, and if caught off guard may not be able to use those skills."
It's the difference between carrying a knife on your belt and holding it in your hand wherever you go, to give a mental image. Mari and other social specs have the knife in hand all the time and can cut with a casual motion, while Hazou has to draw it from his belt before he can cut, and that means a) most of the time he is unable to cut unless he realizes he needs his knife, and b) if someone can stop him from drawing his knife, he can't cut even if he needs to.