I usually hate these kinds of things and it's definitely a slippery slope. It will create a very narrow space for artists to work in if they have to adjust to every single remark.
On the other hand, I kind of understand this. I mean, if I had burn scars I'd feel terrible and ashamed, while trying hard to cope with it. I wouldn't want to read how awful it is either. Maybe if this little side story, or whatever it is, delved deeper into the subject, it'd make us all feel empathy and be more understanding on this very topic.