In this case, the FSF is spot on the mark. If Microsoft wants to follow Apple’s lead and build their own computers designed to run only Windows, they are free to do so. But as long as they are acting merely as a software vendor, they should not be allowed to change established standards in a way that requires developers of other operating systems to go through Redmond in order for their software to be installable.
Likewise, device owners should be able to load whatever they like on their hard drives, without having to jump through hoops to do so. It’s not a level playing field when Fedora or Ubuntu, but not Debian or Slackware, can be installed on a Samsung tablet that was originally equipped with Windows, because of signing key issues.