Using ableist language as insults is always bad, even if the words seem innocuous. Some may reference the “euphemism treadmill” to try to justify their behavior, but it’s crucial to understand that the treadmill is merely a linguistic observation. It does not exist to normalize ableist behavior.
what is the euphemism treadmill for those who dont want to google
The euphemism treadmill rather implies we simply load all the meaning and intention on a new word when the old one becomes unacceptable.
But that clearly isn’t the case with this series of words. Many of these words have clearly different meanings and different social stigmas, and some are in use at the same time.