“No, the Rabbonim have the right and the ability to figure out why Hashem said what He did, and then to apply that principle to other cases as well. This is how the Rabbonim have figured out what the halacha should be for thousands of years, ever since Hashem stopped talking straight to the “
And clearly not all wer or are in agreement with each other as to how that principle is applied, or we would not be having this discussion.