Reread that quote, and you will see that I was saying that just because they are required to distribute the source code with binaries–which they are only required to do if they distribute binaries–does not mean that they have to take any steps to contribute the changes they’ve made to the upstream project.
Businesses can already create their own forks of GPL-licensed software and not contribute their changes to the upstream project; in fact, they do not even have to share their code with anyone at all if they use it internally do not distribute binaries. However, they are incentivized to share their changes, even if they do not have to, because if they do not then merging upstream changes will become increasingly difficult.
I wasn’t aware that coreutils was going somewhere.
I would rather be a moron than someone who calls for others to be tarred and feathered over their choice of an open source software license of all things.