In a conversation about whether or not to add man-made touches to natural beauty... you didn't mention modifying natural beauty, but an already man-made thing.
The works of men, and men themselves, are part of nature.
It is nothing short of hubris to believe otherwise. We, like all apex predators before us, will soon become extinct from this planet leaving only fossils in our wake.
Nature encapsulates us - not the other way around.
Sorry but that's ridiculous. Yes, on a philosophical level you can say that, but the word "nature" is defined as excluding anything human-related.
> "The phenomena of the physical world collectively, including plants, animals, the landscape, and other features and products of the earth, as opposed to humans or human creations" - OED
Otherwise there would be no point having that word as it would by synonymous with "everything".