Does point (b) actually matter? I thought the location of center of mass and center of thrust doesn't matter in a non-gimballed rocket according to the Pendulum

Does point (b) actually matter? I thought the location of center of mass and center of thrust doesn't matter in a non-gimballed rocket according to the Pendulum Rocket Fallacy (https://en.wikipedia.org/wiki/Rocket#Pendulum_rocket_fallacy https://en.wikipedia.org/wiki/Rocket#Pendulum_rocket_fallacy).