Why bring in Nahum? IMHO it is because people are getting desensitized to the usual guilt inducing scriptures, so the WTBTS needs to think up a crazy story and apply obscure scriptures to try to get around the problem.
It would be unthinkable that the father try to look for gainful employment during the week when most businesses are open, yes trust in Jehovah and all your bills will be paid, money will rain down from heaven and solve all your problems as long as you go out in service during the middle of the week when every householder is not home, because they are gainfully employed.