NASA admits that climate change occurs because of changes in Earth’s solar orbit, NOT otherwise!

Yeah I ponder on this philosophical points pretty often. At the end of the day there really is no "right" answer. The medical aspect you mentioned is another prime example that ties in with this. As you said cancer is "natural". Diseases, plagues, illnesses, etc are all part of the natural world of which all living beings are subject to. Wildlife dies of ailments all the time as part of the natural order of the planet. A simple broken bone is enough to kill many species. Only we humans are intelligent enough to combat the natural illnesses of our world and we continue to get better at it as we progress technologically.

Are we "supposed" to do that? We didn't use to do that, at least nowhere near to this extent. The average lifespan of a human being is multiple decades longer now than it was in years past due to modern medicine. Is our increased lifespan "natural" or are we artificially extending our lifespans beyond what they are "supposed" to be? Diseases kill living creatures, the animal kingdom has no vaccines for diseases yet we do. Are we "supposed" to die when we get cancer and we're screwing up the natural order of things by issuing chemotherapy? Or is our ability to combat disease "natural" in itself due to our evolved brains and ability to do so?

Even if global warming is "our fault" is that "natural" as a result of us evolving into modern man? Or are we an anomaly as a species that is the worst parasite that Planet Earth has ever encountered? But even if we are parasites destroying the Earth are we not natural to the Earth? We didn't get dropped off here from another world we evolved here on Earth with everything else. Cancer is natural even though it's a horrible disease that kills, as are natural parasites that also kill. Nobody likes the Black Plague but it wasn't a disease artificially created in a lab it's a natural born ailment. Are we humans to the Earth itself what the Black Plague is to us? A natural parasite that is killing the planet but is part of the natural world even though it sucks?

At the end of the day the Earth will still survive even after we are gone. Whether in the pure moral aspect we humans are considered a parasite of Earth or a natural next step in the evolutionary process the Earth will be here long after we are gone. Whether we are gone in 100 years or a million years the Earth still has a lot of life left. Whether or not we are here as a species is a different story. I know that the more religious among us completely disagree with this but the Earth was not specifically designed for humans. The Earth and the cosmos overall are just "here", not here for "us" but just here. The Earth was here LONG before we humans were and it will be here LONG after we are gone.

We humans will either be a long term species who thrives for millennia to come or we will be nothing more than a fraction of a blip in time on the cosmic calendar. It makes no difference to the Universe just as it made no difference to the Universe for the past 13.8 billion years long before we humans showed up and evolved to the point of being able to even ponder these sorts of things.