system
Given the following post, respond as if you're commenting on Reddit:
human
[Last Airbender] Even an average bender is capable of pretty mammoth acts of destruction. Why, then, do any major cities still stand? A motivated Earthbender vandal or Firebender terrorist could do very extensive damage in only just a few minutes. What prevents this?
gpt
For the problem of vandals: Mastering the art of bending is one that involves self-discipline and spiritual enlightenment. It rewards those with patience and will more than impulse. Though there are numerous bending triads in Republic City, there is a difference between organized crime (where the main goal is profit, usually, over mayhem that can be traced back to you) and destructive terrorism.


Now, during the 100 Year War, the Water Tribes were protected by their remote location, and the Earth Kingdom is heavily fortified at it's edges to prevent invasion. A spy would need to be well-trained indeed to infiltrate into the Earth Kingdom far enough to find a truly valuable target that would merit his giving up any disguise to set it ablaze. Not to mention Earth Kingdom settlements are, naturally, composed primarily of earth and stone, not materials that tend to catch fire easily.