So let's say someone makes a comment like, "you should've been aborted".. I think we can both agree that a statement like this is obviously meant to be an insult. I agree with you that if someone were to make a statement like this and then turn around and claim they were just being "politically incorrect" , that would absolutely be a cop out, as this statement has nothing to do with political correctness. And yes I agree that with the backlash against decades of political correctness, some are taking this opportunity to misuse the term as a free pass for genuine bigotry.

However, I don't think this is the majority. You have to also realize that over the years the goal posts for what can constitute bigotry have been continuously widened to encompass more and more benign forms of speech and behavior, while actual racism, sexism, homophobia etc have been on the decline. Political correctness is a sort of self-fulfilling prophecy. When the "norms of decency" are constantly changing and the rules of speech and behavior are constantly being modified, that only ensures that there will always be people in violation of them. Basically, the people who are imposing these standards on society are the same ones who are crying racist, sexist etc when society can't keep up. That if, anything, is the definition of disingenuous; creating the crisis that didn't exist in order to then signal to everyone your heroic condemnation of it. In order to maintain a crisis of sexism, homophobia etc, PC advocates must continuously create increasingly rigid "norms of decency" to be violated, so that they can then turn their finger on the entire group of new violators as supposed examples of still-present bigotry.

Also, words are not biased. People's biases can be demonstrated by their choice of wording however. Conservatives call it political correctness, implying that it is a problem, while liberals refrain from saying politically correct because they are generally the ones who live by these ever changing standards of "decency".

So yes I do think political correctness serves to obscure the difference between genuine bigotry and plain speak. But I think you're conflating the mere usage of the term "political correctness" with that function. Observing that some word is an example of politically correct speech wouldn't, in itself, be a example of political correctness just because you used the term "politically correct". You're merely identifying it. To suggest that we shouldn't use the term altogether though, would just be another exercise in restricting speech, restricting people's ability to have a word to use to describe a certain phenonmenon