That's right. We are distinctive as male and female in a wide variety of ways which are relevant to many aspects of life.
God did give us brains and we have our free will.
We can use our brains to discern that our created nature includes the fact that, by design, the "cause" of sexual intercourse produces the "effect" of new human beings. We can use our free will to reject that truth and engage in the "cause" behavior while acting to prevent the "effect."
In a similar way, we can engage in the "cause" behavior of eating, while rejecting the "effect" of nutrition, by vomiting the food. This is simple scientific observation, and even the ancient Greeks and Romans understood it. They also understood that a society collapses when enough people live "in the moment" of sexual pleasure while denying the future.
So if I choose not to have sex on the six days or so that pregnancy can occur, am I practicing contraception?