The difference is that, for Windows, a million other people have seen your problem most of the time, so there’s usually some kind of support article that can point you in the right direction on how to fix your problem without having to dive into the docs.
Linux just doesn’t have that luxury. If I were getting paid to solve the problem, sure, I’d probably have figured it out in a day or so as a Linux noob. But I’m not. My free time is limited. I don’t need to know much about Windows because it works pretty much all the time (ymmv).
I’m a mechanical engineer and have spent literal years in front of Creo and SolidWorks. Trying to use FreeCAD felt like flying a Cessna 172 after being accustomed to a business jet; they can ostensibly get you where you need to go, but the cost in effort to use the tool is not worth the cost saved in buying the commercial tool.