@Low: To make him think he can avoid KS but never did in the first place.
Not sure if you are trolling. Tsuna can literally see through KS with no difficulty. Tsuna has no difficulty against powerful telepaths such as Rokudo Mukuro who can control people in Japan from thousands of miles away in a prison in Italy. Aizen is fodder compared to illusionists such as Rokudo Mukuro and Torikabuto, who could make illusions so powerful, they transcend reality itself, where illusions are no longer applicable to just the casted, but everyone in the vicinity, regardless of whether or not they are selectively targetted.