This is park and wildlands conservationist poilicies of many years. By putting out ALL the forest fires the underbrush grows prodigiously and the BIG fire that happens in dry conditions with lightning or an arsonist’s match is truly catastrophic. The Indians of North and South America burned the forests at frequent intervals which did not destroy the grownup trees but cleared out a year or two’s accumulation of underbrush. Undergrowth never built up to clogging proportions. Lightning caused fires were minor things because there was very little fuel to burn.