It is a way to speak and behave so as not hurt anybody’s feelings.
It started with American feminists:
Policeman Police officer
Mister: a married OR unmarried man
Miss/Mrs an unmarried/married woman. Ms
Then, it was used by civil rights activists:
Negro Black Colored People People of color Afro-American African-American
It spread to other forms of discrimination:
Ageism: Old experienced
Heightism: Maggot vertically challenged
Lookism: ugly gifted with an unusual charm
stupid gifted with an alternate intelligence
Ableism: handicapped differently able
Sexual harassment in the workplace date-rape
In the UK, English Humour being what it is, they use Political correctness to mock people.
For instance, James Garner wrote “Politically Correct Bedtime Stories”.
This person is gifted with an alternate intelligence and a significantly extraordinary figure.