What are you trying to argue here? All pins on the connector are rotationally symmetric. They may not be useless, because they still increase overall bandwidth,

What are you trying to argue here? All pins on the connector are rotationally symmetric. They may not be useless, because they still increase overall bandwidth, but they are indeed doubled. A non-reversible connector would not use this design and there would be fewer pins as a result (as much as half). Also: USB-B micro connectors might have 5 pins, but the cable itself has 4 wires. The OTG pin is grounded in the connector. This is actually why I said "4(ish)" in my original post.