The reason people first language fails is because there's some subjects of this language that find the original wording insulting and there's some subjects of this language that find the new words insulting.
I have back issues. Major ones that pinch my sciatic nerve due to a fractured column that healed improperly. They've gotten to the point a few times in my life where I could not walk much less feel (at all) my leg for prolonged periods of time. If someone called me a "person experiencing a disability" it sounds like you're trying to remove the hurdle that the disability puts in my life. I already had to grapple with the idea that I am not bound to that disability. I have found ways to climb small mountains, to hike, pack, move/lift heavy things, sit, and work out all with abundances of caution and very proper form.
That's to say, codifying this language just does what the first correction set out to correct: it institutionalized language some people don't like. In a world with a big variety of perspectives and experiences, the best resolution to these problems isn't some authoritarian document telling people how to talk. It's gracefully correcting people on the way that you'd like to be spoken about and people respecting that. Nobody needs to walk on eggshells around how I'd like to be referred, they just need to meet me where I am when I make a choice.