It doesn't work like that and you know it.That is like saying we shouldn't be upset that our neighbors house burns down when started by an arsonist because they can burn down by natural causes as well.Or that we should just go ahead and burn an entire neighborhood down in California just in case it could be burned down by wildfire.Nature has a way of destroying but it has also worked out a way of regenerating as well. When yellowstone burned down decades ago, it ended up encouraging new species to thrive. That could only thrive over those conditions.Hawaii destorys, but an island is constantly also being created.Floods may kill animals, but it also forces them to travel farther leading to them finding new habitiat, and it leaves fertile soil to grow better plants.Humans destroy, destroy entirely, and then destroy some more, without any benefit to nature whatsoever.Dinosaurs became extinct, but all life wasn't wiped out. About 80% was. But there are STILL creatures alive today who came from those time periods. Then the extinction of the reptiles led to the rise of the mammals.But when you just eliminate everything and not let nature takes it course, what happens?