For those who are unequivocally against the use, consider this - the term was used on me, and it played a roll in my acceptance of Church authority. Had I not been offended, I wouldn’t have been sparked to debate. Had I not debated, I wouldn’t have realized my error. Had I not realized my error…
Perhaps the difference is that with me, the term was used to make an important point, and it was followed up by a large amount of instruction. It was also not used as a specific label for me, but as a general term of description (which I very quickly figured out applied to me perfectly). Calling a person that name and then walking away is not going to spark discussion or understanding. Using a surprising term, might invite more discussion and be more thought provoking than only using “polite” words. At least in some situations.
Furthermore, as an earlier poster mentioned, it doesn’t always make sense to talk for 3 minutes in great detail about the nuances of Nancy Pelosi’s lack of obedience to Church Authorities. Sometimes it is simply more effective to describe her with a label that everyone is going to understand. Since Pelosi is an outspoken public figure, it is important to look critically at her in this way - knowing that she is a “Cafeteria Catholic” or that she “regularly ignores Church teaching” or that she is a “Dissenting Catholic” or that she is “not obedient to Church authority” can be very helpful for a Catholic trying to figure out how much to believe of what Pelosi says. This is true of others who have influence over Catholics. I am not nearly as likely to use the term “Cafeteria” as “Dissenting” or “not obedient to Church authority” but either way, the person I am talking about is likely to be offended. Therefore, it should be used when necessary - either because a 3rd party deserves to know the truth before they are scandalized, or because the person in question might actually be provoked to reconsider their point of view, or in a respectful way if one is debating with the person in question.
Labels do not need to be thrown at every person who fits them, all the time. But they do have value in certain situations.