Pirating an old movie to sell is not considered ethically problematic everywhere. In many, many countries on earth pirated DVDs were sold at the marketplace, and no one – buyer or seller – had qualms about it. When the authorities shut down such sales, it was almost entirely because they were being pressured by the USA and a handful of other Western governments, not because the local ethical perspective on this changed.
This genre of comment is so tedious. We aren't talking about everywhere, the FBI is a US agency, the big companies we're discussing have won in US court. This thread is about the US.
The FBI and courts are enforcing the law that exists solely because the Founding Fathers enshrined it, but that says nothing about the ethical views that might exist among Americans. There are plenty of Americans who don’t find selling pirated media ethically problematic and would like to see the kind of marketplace sales and wide use of Bittorrent boxes that people in other countries have enjoyed.
There are violations of copyright which are ethically fine, i.e. pirating an old movie to watch.
Then there are violations of copyright which are ethically problematic, i.e. pirating an old movie to sell.
When a big company violates copyright the nature of the violation is always much closer to the latter.