What I mean is that the definition of what counts as "politically correct" has expanded to include lots of stuff. It's such a nebulous term that it can be applied to anything the reader dislikes.
But hasn’t that come to be because activists want to broaden and redefine what is not politically correct? Most people do not want to broaden the term, on the other hand there are people who want to make specific topics and utterances unacceptable things as mundane as stereotypes. Of course _some_ stereotypes are malicious, but many are simply lazyness. Some people would rather suppress data if it counters an agenda, etc.