Though it may be used by industry on some occasion to protect someone's ability to profit. Copyright and the right to the fruits of your labor are not the same thing.
In cases like this disregarding one isn't equivalent to infringing on the other.
I expressed the contrast between copyright and the right it attempts to protect above. Notice that I didn't say anything about profiting from the fruit of their labors, but the right to them, no matter whether they choose to profit or let it rot. It's just as much an infringement to preserve it without their permission as it is to sell it.
In cases like this disregarding one isn't equivalent to infringing on the other.