Terminal Optimist Judaism
The people in story are making the same argument you seem to be making. And the prophet is correcting them. Again, just because HaShem doesn't break a promise, that doesn't mean HaShem is not effected. The prophet is saying that, but that is being ignored. ContextNo, because Hashem established from the start that if Am Yisrael return to the right path it is automatic in the reality created that the benifit of keeping the Torah would automatically follow. Hashem didn't change, we did. This is why in Ha'azinu Hashem already explained what would happen in the future and how things would turn out.