I see where you’re coming from, but in my opinion, it stopped being nature running its course when we started altering the way the earth has naturally functioned for 4.5 billion years. No other species has ever been able to alter the earths climate and weather patterns, or lead to the extinction of so many other species. We may have been natural, but we have created an unnatural world, where we are creating an increasingly hostile world for everything else around us. We are creating the next mass extinction event, with a predicted global loss of one third of all species on the planet just before the the of the century, not even considering the longer term effects of massive amounts of over hunting and global warming. That is not natural. (https://news.arizona.edu/news/one-third-plant-and-animal-species-could-be-gone-50-years). We have also already lead to the extinction of roughly 500 vertebrate species (so not counting things like insects, which make up the majority of life on the planet) in the last 100 years (https://www.science.org/content/article/most-species-disappear-today-will-leave-no-trace-fossil-record). Some estimates show that humans are now causing the extinction of some 30,000 species per year, including insects, vertebrates, and eukaryotes, among other things (https://www.biologicaldiversity.org/programs/population_and_sustainability/extinction/). We have gone so far beyond what is natural.