The purpose of Congress is to make these kinds of decisions. They pass the buck so they don't have a voting record that an election opponent can use against them.
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.
They need to do their job.