I agree. I mean it can go on forever, but it's probably a bad idea.
The problem with crafting a balanced budget amendment is building in enough flexibility that you don't screw yourself in case of genuine emergencies, yet don't let pseudo-emergencies and politics undermine the intended fiscal soundness.
At a very minimum, I think you would have to give the Executive branch some temporary authority to declare an emergency. Which would have to be ratified by Congress within a sensible interval or terminate. Sort of like we do with the use of military force.
Thereafter, I suppose we could rely upon the Congress to authorize an extension of borrowing by a supermajority. But perhaps only if that same Congressional action either raises revenues, cuts programs, or both to quickly end the imbalance.
The problem is, how do we keep this from turning into exactly the same sort of circus we see with raising the debt limit? If we require a supermajority, we make it too easy to shut down government for good or bad reasons. Yet if we don't we risk making it too easy to declare emergencies willy nilly.