It's not that the medical words themselves are stigmatising. But them becoming used as terms of abuse in a cultural sense.
Spasticity for example. A medical term for muscle spasms often seen in cerebral palsy.
Which is why the society for sufferers of CP was originally called the spastic society. When 'spastic' became a playground term of abuse with associated facial and body mocking, the society changed it's name to 'Scope'. And then the facial and body mocking became 'nuhhhhh, you scopey'
Same as terms like moron, imbecile, cretin etc became terms of abuse for someone being stupid or doing something stupid or being intellectually challenged.
Then the medical terms became mental handicap or mental retardation and they became terms of abuse.
So then the terms became learning disabilities or intellectual disabilities so the terms of abuse became LD or ID and so then the medical terms became special needs.
So now the terms of abuse are 'special' 'special ed' 'spesh' or ' spesh school, spesh room, spesh bus, sunshine bus for the spesh kids'.
Perhaps you should educate yourself and not perceive victimisation or abuse when that didn't happen and attempt to accuse posters of being mean when they're stating facts.
Words matter, yes. But all the words used as terms of abuse culturally originally had medical use and definition which were then abused by society. So the medical community came up with different words to mean the same thing.
Hypochondriac means nothing different to health anxiety other than one had culturally become less sympathetic than the other.