Even as a desktop os Linux in general as a windows/Mac OS replacement for the every day person is strongly disadvantaged by being a shit tier user experience. I've tried to switch several times for laptop OS and just gave up. Even if everything was easy and solid, and it had the same abysmal trackpad support it has now, I wouldn't use it. But basically every facet of the experience is like that trackpad support.
I don't even want to think about what a ghetto the mobile experience probably is.
After having used Linux for multiple years I had to use macOS (and later Windows) and I found the experience shitty as well (ex: no system way to manage programs, strange multi-user support, annoying forced updates, more complex to setup remote connectivity and others). When my parents computer broke I put a Linux on it, and for them works great (just browsing and occasionally printing a document).
Sure, if something is great for you stick to it, but assuming things about "every day persons" seems exaggerated. I also heard macOS <=> Windows switching experience is "bad" so for me it is more "what people are used to/how much they want to improve" than an inherent "quality".
I don't even want to think about what a ghetto the mobile experience probably is.