Mac users, and actually most laptop users, don't give a shit about the things you mention. They buy it, use it for some 2-5 years, then sell it and get a new model. Upgrading hardware is way too complicated for most people. They don't know or care what a BIOS is. It comes with the OS installed and that's the only thing they would ever want. Turn it on, use Safari, outlook, and office 365, maybe some tool like Photoshop/Ableton/etc, that's it.

I mean iPhones are the same right? They lock down everything so it's idiot proof and they control the environment exactly so they can maximise the smoothness of the experience.