Earlier quoted context omitted.
"Are you going to tell them they have no right to their own work anymore 20 years after they had one of their most successful releases?" In a word, yes. The entire purpose of copyright is to enrich the commons by granting a limited term monopoly. Without that purpose in mind, copyright loses legitimacy. It's a government granted right, and, in the US, there is specific authorization in the constitution to make such a…
All rights, human rights included, are just some arbitrary rules some part of humans have decided to follow. These laws could also set the counter for let's say 5 years after the death of all of the original authors or something like that. There is no reason for these rights to transfer indefinitely.
That's not how patents and copyright work. These are government granted monopolies. The wording goes the other way around: The government is authorized to grant these monopolies. That's very unlike rights to life, property, etc. Patents and copyright don't come from the same tradition as proper human rights. They're different, and there is no human rights argument against limiting them sharply, at least not in the US constitution.