Is the pressure to be Politically Correct selectively applied?

I do not mean in the arena of the oppressor vs the oppressed. We already know that only some people (oppressors) must be politically correct.

I am talking about something else.

If a person has a drug and/or alcohol problem, it seems to be perfectly OK to recognize that they have a problem. In fact, I can make the argument that people hope that by saying it in some cases, the abuser or addict might finally realize that they have a problem, and take steps to save themselves, their families, and the society from the costs and burdens associated with their problem.

But if a person is obese, it seems to be regarded as inappropriate to discuss it as a problem. Science and medicine know it is a health problem, shortens life, contributes to heart disease, cancer and diabetes, and that it drives all health costs up in addition to taking up space on airplanes. But talking about it socially seems to be Politically Incorrect. In fact, bringing it up might make one guilty of the social crime of “body shaming”.

Isn’t that an inconsistent application of a principle?