But the term was created to legitimize the material.
Do you have a source for that? I can't find anything that states the origin of the term itself is seedy. Besides, it's just a plain description: it's pornography with children in it.
The only sources I can find that support CSAM over CP claim that CP somehow implies consent. But I'm saying that simply isn't the case. I am not saying that words arent powerful. I am not saying that no words ever need to be changed. I am saying that these words don't need to be changed.
Based on those same sources, I'd speculate that this outrage is just misplaced anger. They almost immediately start talking about how bad sexual abuse is, which is not really relevant to whether it should be called CP or CSAM. Just because CP is bad, does not mean the term CP is bad.