He could always learn it. Maybe go to his local community college and take a programming class. He could take an intro physics class as well. Might help him out.
Come on, nobody is "all bad". I understand the hate towards this guy but don't turn this into an echo chamber in which we demonize people we dislike. Everything he says isn't a master plan, considering the amount of dumb shit he does and says in general... He probably had a problem with a Windows/OSX update and had the brilliant idea to post this because he thinks his ideas are brilliant and original. This guy is just a normal dude doing normal people things while sitting on a corporate throne. The quiet ones are the ones you should be concerned about.
It's an expression. In this context Elon is the broken clock and saying desktops should run Linux is one of the rare times he's been right about something.