Guess what? That ain't fireproof either. You let the woods get all up close and let the ladder fuels stack up, that mud hut will get fired and cracked and fall to pieces in the kiln-like temps a forest fire produces. That'll be a pile of hard-fired rubble
One issue I saw with older Southwest homes, mostly in California, was the weight of the red clay tile roofs.
If there was a fire in the interior, the roofs could collapse and injure or kill the fire fighters inside.
If the fire was bad enough, they would let it burn and put out the remnants after the roof collapsed.
Now, I hear, they use plastic or lighter materials that look like those old clay Spanish tiles.