Sometimes you have to "bring out the big guns" and send a letter to the CEO... sometimes you just have to say "I want to continue to work remotely as has been proven to make me more productive." and be ready to find another job if the company doesn't meet your needs any more. Work is a two way street and Apple employees can probably find work elsewhere easily enough.
That's on a personal level though... this happens to be on a "union" level ("employee group"? not sure if that's a union per-se but it's more than just a single person). I think a union (or whatever this is) has the obligation to make these sorts of moves - so there is a difference there.
I skimmed the article before and just reread it - 80 people wrote the letter and 2800 joined a slack channel for it - so this does go beyond individuals into a more "our voices will be heard" direction.
Still need to stand up to be heard and you can do so without being a squeaky wheel :)