I would say that the popularity indicates the higher usability. People find Windows and MacOS easier to use, with less random problems. I also don't understand what you mean by lack of package management? Homebrew on MacOS is very decent, on Windows you have Scoop/WinGet which work very well. Either way both are much less fragmented than the Linux flatpak/snap/.deb/AppImage/.tar.gz nightmare which a regular user will never be able to figure out. I swear it's like Linux advocates have never even talked to a normal person, and are somehow under the illusion that Linux is a easy-to-use, user-friendly OS, which .. it's not. Any OS that requires you to know CLI basics to install regular apps is not a user-friendly OS (Chrome gives a .deb, but on some recent distros it cannot be installed by clicking on it! IntelliJ gives .tar.gz, which, well, good luck figuring that out, and others give AppImage, which needs chmod+x!).