To an ignorant person, the greenhouse effect isn’t simple. Not because the idea itself is complex, but because it implies we can and should do something about it.
And ignorant people would rather tell themselves it’s not man-made because that would mean we can’t fix it and, therefore, don’t have to.
See Ian Danskin (if you haven’t): https://youtu.be/dF98ii6r_gU
True, but that assumes that the people filing copyright lawsuits know the law and are acting in good faith. And that the recipient does, too.
If I’m an artist living paycheck-to-paycheck and I get a copyright-related cease-and-desist, I probably won’t have the money or time to fight it even if I know that it’s wrong.