Earlier quoted context omitted.
If an author sells the rights and does, should the buyer automatically lose what they bought? Sounds like that would severely decrease what authors can earn, especially older ones.
There's no reason that "selling copyrights" needs to a be a thing. If the author themself wants to profit from their work, sure, but once they die, that's it, and there's no excuse for it to not be in the public domain at that point.
So if Disney wants to make a TV show out of your novel series and you turn them down, I suppose they now have an alternative way of making the problem disappear and getting the outcome they wanted...
Joking aside, this idea really seems to create a perverse incentive to make authors die sooner.