What other way is there to access "copy" (Ctrl-C)? I feel like this stems from the belief that the keyboard is secondary to the mouse. So the official way is to right click and select copy from the menu? When was the last time you actually saw someone do that?
You could go the other way and say all the letters on your keyboard are shortcuts for entering the characters specific to your language. After all, there are far more characters in unicode for all the languages in the world and there is no shortcut for those. In Emacs I could do absolutely everything via M-x commands, even typing: e.g. M-x "insert-char" "LATIN SMALL LETTER J".
OK, this is becoming a bit silly. My main point really was that by adopting a keyboard-driven workflow you no longer think of the keyboard as "shortcuts", it just becomes the way to do it and, yeah, I definitely think Ctrl-C counts as that.