"if you define all exercise of will " See, here is the problem. The article discusses what the Catechism says. It is based on a philosophical point of view that divides behavior into two - one, an exercise of free will in which man is able to overcome instinct, desire, and mortality in order to pursue the divine state, i.e. virtue, and the second is the animalistic state of succumbing to desire and indulging in the flesh.

For some reason, you are trying to posit "will" as something which it is not. You do not "will" yourself to sin, to inaction, to indulgence or the rest. You submit to them.

"It doesn't really matter whether Milton said something or the Catholic Church did" Seeing as how this is about what the Catholic Church says, you better rethink, as your line of argument only verifies ignorance.