What type of person knows how to install an operating system that isn't a tech geek/enthusiast? Not even Linux, who can install Windows or MacOS on an empty har

What type of person knows how to install an operating system that isn't a tech geek/enthusiast? Not even Linux, who can install Windows or MacOS on an empty hard drive, but doesn't consider themselves to be a "computer person"? If the Linux desktop can't take off until my grandma is able to install it herself, then well, yeah it's truly fucked.