If the ships are sitting around more than a week, it’s probably quicker to send them to the Gulf or southeastern ports.
Maybe, if logic was used. But the ships are not going to change their scheduled ports of call and neither are shippers going to change every set of customs clearance documents just because congestion is less.
It would be more complicated than diverting a flight from JFK or Newark to Pittsburgh because PIT was less congested. By a factor of 10,000 or more.