Right--firebreaks Back Home (I grew up in Los Angeles County, an area with an ecology that requires fire on a regular basis) are mostly just intended to keep the fire from burning houses. They know that the fire will spread out, not just in any one direction. Even with prevailing winds going in one direction, the fire still spreads a little in others. Just a lot more slowly.
"Now everyone was giving her that kind of look UFOlogists get when they suddenly say, 'Hey, if you shade your eyes you can see it is just a flock of geese after all.'"
"You can't erase icing."
"I can't believe it doesn't work! I found it on the internet, man!"