SquireFan91 wrote:[... but if it's already there and nobody has to get hurt to get it, why not use it?
That's why there are no remains of the nearly 60,000,000 North American bison in its original range . After the genocidal slaughter of the bison (which took only a little more than a century), the skeletons were picked up and sold to factories for making bone black. The removal of that much biomass, in addition to the replacement of all native grasses with European grasses, had ecological consequences that are still being felt today.
Future paleontologists who would not have knowledge of these events would likely conclude from the fossil record that the bison, like the mammoth and other Pleistocene megafauna, became extinct at the end of the last ice age, about 12,000 years ago.
There is another story about "it was there and I just picked it up": back in Illinois not too long ago, a woman artist visited the Peoria Wild Animal Park (or whatever it was called at the time). When she went by the American bald eagle exhibit, she saw a feather lying outside the cage. Being an artist, she picked it up and subsequently used it in a show piece. After exhibiting the show piece, Federal agents moved in, confiscated the piece, and arrested her for illegal possession of an article from a protected species. IIRC she actually got jail time and a hefty fine after losing the original case and a number of appeals.