Why the emphasis on the keyboard use?

I'm wondering what the reason for the increased emphasis on keyboard use to operate the program is?

The solutions seem to be annoying people, so far.

If the users had a really clear idea of exactly what the goal of making the menus activate with the alt key and why the Control [ and Control ] keys have become so important we have to be told about them every time we put our cursor over an IM tab and such it might help us figure out a way to accomplish your keyboard usability goals without breaking chat, building, camera-ing, etc.

Are you trying to comply with some sort of accessibilty law or accessibilty requirement by a potential customer or is just a desire to be more like other programs or what?