[…] in reality they just know how it works
In my experience, they know how a few utilities and how a handful of programs work, but have no idea how Windows works. Not that many people actually know how Windows works.
Roughly figuring out the boot sequence of Linux is relatively easy once you’ve used it for a year or two. What happens when Windows boots? Who knows? kernel32 probably is involved at some point.
Linux/Unix is actually relatively simple and logical once you’ve figured it out. Windows is a messy dark maze with grues waiting at every corner to eat you.
It’s a WIMP system. They all work the same way. Worst case you have to click around a bit.