So before people and when a fire started, it burned until there was no more fuel to burn. Its a part of nature and the planet is designed to cope with it.
WE are the dumb shits freaking out over it, as well as the dumb shits starting the fires.

When the world is done with people it will rid itself of them, no amount of tree hugging will stop it or change that in any measurable amount in the sands of time.