Why do people say Tornado is level-independent?

My tornado and king tower are both underleveled. Pulling the hog to activate Kings tower is no problem, but usually after the king is activated, people just pull the hog into the center where all 3 towers shoot it. I do it perfectly, However,hog still gets a shot off!!


I didn't find the right solution from the Internet.

References:
https://forum.supercell.com/showthread.p...vel-independent

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