Mivey, the shortest path back to the same phase is never leaving the terminal in the transformer. Voltage from "A" to "A" in any circuit is going to be zero, meaning there is nothing to cause current to flow.
You can attack me personally for being an idiot if you like, that is a teaching style I haven't encountered in quite a while and try not to employ personally. I am just a simple electrician speaking to other simple electricians in most cases. I don't much appreciate being called a liar, either: I told you that if you can clearly illustrate why my analogy actively does a disservice in visualizing current flow, I would remove it from my teaching. You then claimed that I must be so invested in it that I can't hear you and would not remove it. No, I respect your experience and your knowledge, and I am listening with rapt attention. You are not conveying the problem very clearly, and frankly, being damned rude about it. I had forgotten about this since the last time I checked in, that's how completely enraptured by this topic I am. Trust me, if you can make your case I will abide by my agreement and cease teaching the method. I do preface that portion of the class with making it clear that I'm not an EE, and this is a cheat to visualize current flow - not that it was fact, for the record.