I'm not sure being burned is the most painful way of dying. Breathe the fire in, and you suffocate quite soon. And 3rd degree burns stop hurting when the nerves get destroyed.
It's *not* dying by fire, but keeping yourself alive, seriously but not fatally burnt that stings a bit.
As I said to the nurse in the resus ward who was testing my arm for sensitivity "Yes, it hurts, that's good, nerves still exist". She felt a lot better about having to do it when she realised I knew why it was being done, and wanted it to be done. I could tell she was in intense distress about it beforehand - who wouldn't be? Fortunately it looked worse than it was. No permanent damage to airways, eyes or structures (nose, lips, eyelids etc), just upsetting to look at. Though I have to say that despite the warnings, when I looked in a mirror I felt relief that all I'd lost was my skin. It looked a mucky mess, but appearances were deceptive. Everything was healable in time, it just...stung a bit. Significantly uncomfy, especially since I have a bad reaction to morphine. Had I been fatally hurt, it wouldn't have been nearly so unpleasant. I prefer Life though.
I'm not saying being a serious burn victim is better than having to treat one - just psychologically easier. I'm not sure I could have done her job, so anything I could do to relieve her burden was needful.
Telling the children a little white lie that might stop them from getting into real trouble was responsible. And it is uncomfy, after all.