No, it is highly relevant as some USB-A to USB-A cables do function exactly like that. And again there seems to be some serious disconnect somewhere here becau

No, it is highly relevant as some USB-A to USB-A cables do function exactly like that. And again there seems to be some serious disconnect somewhere here because I've got no clue what you are trying to say. My made-up usb-to-serial adapter example will work as is - even with two hosts talking to each other (through a intermediary). Just as well as such a cable will work. Why talk about corruption? Why would host-centric be a problem in this scenario?