Yes but people don't WANT to learn things like this. My mother doesn't want to remember what mouse button to click or that CTRL or ALT is a modifier on this command.

I would argue that THIS is what made Apple's OS hang on all those years it was in the severe minority. There is a segment of the population that wants only one mouse button to click, not 3, not 3 plus CTRL or ALT or etc. Apple did end up having to rely heavily on their option key to extend functionality but at its root the UI was designed so that the average user could do things in a simple, straightforward way. MS sees visually exposing commands to the user as their way to do it and while I may not entirely agree, I don't think it's without merit. My kudos to them for also letting me as a "power user" collapse the "newbie visual noise" off my screen and drop what I want on a custom quick access bar.

Remember: don't let your status as a power user cloud your view of how your grandmother might want to use her computer. There are FAR more 'grandmother' grade users than there are us.