that normally implies something has been arbitrarily disabled.
Linux distros on the Pi have their issues, lack of a fully functional and properly integrated 3D graphics driver being the big one. Anholt is working on one but my understanding is that it's still very much in beta. This limits the ability to use the latest fancy desktops but classic desktops like LXDE, XFCE and Mate work fine.
OTOH Windows on the Pi will only run a single app at a time and that app has to be a "universal windows app" rather than a regular desktop app.
Prior to the Pi MS had a version of windows with a working desktop on other ARM hardware but they refused to allow third party Desktop apps to run. This was clearly an arbitary limitation. I belive that the limitations of windows on the Pi are equally artificial.