mdd – Who are you to say -we don’t Pasken like this? We always go after the last Achron for Halacha. The only time you can say we don’t Pasken like the Achron if there are other contemporaries that argue.
In other words you have no idea why the Chocmas Odom said what he said – maybe he holds like the Rambam or maybe he learns this in the S’A.
So if you want a Heter to do what you want regarding nose rings or anything else of this sort -find s/o whom argues with this Chocmas Odom that came after the S’A. It’s possible that there are, but right now you have to listen to the Chocmas Odom.
Just saying it’s the Rambam and the Mechaber argues on this Rambam in the Kesef Mishna – isn’t good enough!