I agree. The analogy is using our intuition of how objects move because of gravity to explain gravity. It has always seemed circular to me. I bet there is a better analogy.
// Beware the SI's broken definition
// of Hz. You should treat the radian as being correct, as a fundamental
// dimensionless property of the universe that falls out of pure math like
// the Taylor series for sin[x], and you should treat the Hz as being a
// fundamental property of incompetence by committee.
This is all quite entertaining.