By your definition, what isn't natural? What's the point of even having the word natural if it includes human activity?
Tallness is a marker for above average ability to provide. Tall people are not just taller, but in general are wider and deeper, and so are their brains. Tall people tend to make more money, not because they are taller, but because they are smarter.
Many cosmetic traits in humans were cultivated by mothers favoring them in their children, not from mate selection. White skin, blond hair, and blue eyes are examples. It's hard to imagine in modern times but for most of our past mothers had to choose which child survived because food was not reliable. If a mother had 6 kids, one with golden blond hair, the rest with brown, the blond was favored and had a better chance of survival. Many white children are born initially with blond hair and blue eyes, but these traits are free to completely change once the child has successfully bonded to the mother. While men also like blond hair and blue eyes surviving into adulthood, they'll pretty much mate with anything and they were not the primary driver of these cosmetic traits.
People long have known and understood that selective breeding can accomplish huge changes in the morphology, coloration, and behavior of domesticated animals. Darwin showed that “nature” also does selecting.
Humans are part of nature, and if we are talking about the “natural” tendency of women to prefer tall men, that is part of nature. If we are talking about the “natural” tendency of human males to compete violently resulting in death, then that is also part of nature.
Nature also implies that the actions are confined to material causes; i.e. nothing “supernatural”.
Mothers do not often starve their children just because they do not conform to whatever beauty standards are conveyed by their culture. Ever hear of the expression “A face only a mother could love”? Almost all mothers think their baby is the most beautiful thing in the world, even if it isn't.
Do you get this hookum from somewhere, or are you making it up as you go along?
Every human act is technically natural, with reference to evolution.
Don’t let human semantics get the better of reason.