Like nobody is gonna string you up not following the guidelines but in my own writing I follow these pretty much naturally because, yeah, it’s kinda weird that we describe things with limited or reduced functionality as crippled.
The reason language has to constantly evolve for certain topics is that every time people come up with new words that don't carry stigma people invariably start using them in everyday language; so $word that was coined specifically to be neutral becomes $word (pejorative). So for example if people would just stop using whatever word is used to describe people with intellectual disabilities as an insult the vocabulary wouldn't have to keep changing.
* "What are you blind (pejorative)?"
* "What are you deaf (pejorative)?"
* "They're delusional (pejorative)!"
* "They're deranged (pejorative)!"
* "She's hysterical (pejorative)."
* "He's demented (pejorative)."
* "They're absolutely mental (pejorative)."
* "She kind of a skitso (pejorative)."
* "They're special (pejorative)."
* "What, do you need a handicap (pejorative)?"
I don't think it's a good idea to use those words even after they fall out of fashion. It just seems cruel for no reason and it's easy enough to just say something different.
As soon as you ban any word, both pejorative and intended use, the similar next one will be used in a pejorative way, which will give you the same problem later on
Seems unnecessary effort to ban most of the language because some people don't use it correctly. Especially because people are not born knowing those stigmas. So they naturally disappear
You just typed out how that secondary meaning came into being.