counterpoint: Microsoft does serve a lot of computer-illiterate customers. They also have very literature customers but they have to design for the lowest common denominator
It's a very dangerous path to walk down, to think to yourself "I'm smart and powerful, but most of my customers are stupid and helpless, so it's not the needs of my peers that I need to cater to, but rather the needs of the [stupid] many". The contrapositive of that is: Most of my customers aren't truly my peers. Well that's the first step on a slippery slope towards: These people aren't really deserving of being treated in a moral/ethical way, the way I would treat my peers and the way I would expect my peers to treat me.