system
Given the following post, respond as if you're commenting on Reddit:
human
[Avatar: TLA] What's to stop a waterbender turning someone's body into steam?

Katara has been known to generate mist from water, and many waterbenders are known to create ice. So the temperature of water is clearly within their control. What's to stop a waterbender simply boiling a person's blood, lymph, CSF or just whole body?
gpt
It's really hard to do.

Most Bloodbenders can only act during a full moon and even then their really terrible at it (jerky movements, painful for the victim, trouble keeping control etc) so boiling blood wouldn't be a small task.

Plus, most people don't know what a lymph is. People in TLA world go by Traditional Chinese Medicine which doesn't get too specific into organs.