For most of us on Lemmy, buying a PC with no OS installed is like buying a car with an empty fuel tank and/or battery. It's ready to preform at 100% in about 10 minutes.
For most other people, it feels more like buying a car that's completely missing an engine/motor/battery. They don't even know where to start, even though in the case of the PC the process is many orders of magnitude simpler.
PC OEMs could totally ship their machines with linux installed, or even with multiple distros to choose from at first boot. And one of those options could even be Windows 11, the user would just need to enter a key or buy a license after booting up.
It's just a question of motivation. Do they think their customers want it, and do they expect Microsoft to make their life more difficult if they try?
Honestly now with so much of the civilized world looking to break dependency on US tech, I hope that Europe sees a big push towards mainstream off the shelf linux devices.