That's a wild misrepresentation of those laws. They in no way state that a fetus is the equivalent of a human being. In fact, the existence of those laws is a concrete demonstration that the law does not consider them equivalent. If it did, such laws wouldn't be necessary; it would be covered under existing homicide laws.
They're a statement that a fetus is not a human person, but the law will punish some actions as if they had been. That's not just not an equivalence, it's a rejection of equivalence.