It is an ancient practice, that when a human creates something, other humans will observe it and learn from it. Every group of humans living together has practiced this in some form for tens of thousands of years if not longer. Even animals do it. It's a natural assumption when making any form of art.

It is not a natural assumption that someone will digitize the artwork and use it to adjust a couple thousand matrix coefficients in a complex computer program. To most people that seems like copying with extra steps. The brain may in some ways resemble a computer, but what sets it apart is that we have always lived with brains. Everything a human does has already anticipated the presence of other brains, while etched circuits on ultrapure silicon crystals are something new.