I did explain why... ...at least about chasis ground anyways.
You don't switch neutrals because for one they are a reference to ground (safety), and two because if you do and test for power against it makes it appear as though the hot you're checking is dead, which it may not be, (safety).
FWIW, I'm furthest thing removed from a safety Nazi. You just appeared to be proud of your bad control design because you manage to conceive a method to work around it flaws. However all you did was make it more dangerous...lol For all the effort you've put into this project, now is not the time to half ass something.