None of the major os vendors have great usabability. They work, but with lousy updates, and/or limited customization.
Some of the android phones I buy dont even have rooting options.
Some of the android phones I buy dont even have rooting options.
That doesn't stop you from buying a PC from Dell or building one from parts and installing Debian/Ubuntu/Mint/whatever-you-want on it. The percentage of other people who do that is irrelevant because the absolute number is still millions of people, which is more than enough to sustain a community and produce a competitive user experience.
I have an old computer with Windows on it and would turn it on once in a blue moon for the occasional thing that required Windows. It has been years since I've had to use it.