Amen. I've been casually shooting with a Nikon D70 and now a D7000 for around 15 years now. Here's an illustrated guide to every single physical control on the D7000, which isn't even a high-end camera:
http://kenrockwell.com/nikon/d7000/users-guide/controls.htm
...and for many of those I'd need to read the manual to find out what they even do (Fn? Lv?) and I struggle to find any reason I'd need to twiddle with, say, the image compression (QUAL) so urgently that it needs a dedicated shortcut button.