This decision has more to do with the Court owning its own past mistake, where they deferred to executive agencies. But both the judiciary and the legislative enabled the executive to consolidate lawmaking and interpretive power, thus violating the separation (and balance) of powers. Overruling Chevron is a step in the direction of restoring the balance of power. The balance may never be perfect, but at least we can see when we're far off course and make a correction.