I have, thankfully, never had much involvement with codes of conduct but if I did I would want it to pass by a committee or a community vote, with ample time beforehand for discussion, platform, and voting with majority or super majority requirement.
A PR, on the other hand, needs just a handful of political allies — your reviewer — to land, and that’s it. I of course assume the best intentions on the part of the requester, but one could be forgiven for seeing it as a power play, subverting the democratic process.
Not everything is code.