Who is surprised?
It’s because Apple products are heinously expensive, and Linux is far more hassle than most people are willing to go to.
There’s also Chrome OS, I have no idea if it’s any good though.
From my limited experience using it on a shitty Chromebook for school (granted also pretty locked down) and it’s not great. Pretty much only useful for doing web things and the Google ecosystem. I also have no idea whether it’s even possible to get it on anything else.
From a UI perspective I didn’t really like it l, especially as it and other chrome apps got more and more sleek and curvy. I did grow up using a Linux mint laptop though, only getting a dual booted Linux/Windows PC in highschool for some games that needed it as well as running SOLIDWORKS at home. (thanks to my dad for all that lol)