You are telling me, that using an analogue stick to move is as intuitive as using WASD, which aren't even alligned in a cross shape? BULL
Enter and Tab are as intuitive as 'Start' and 'Select'? BULL
Left click is as intuitive as a trigger to shoot a gun? BULL
Also, count the number of keys on your keyboard, now count the number of buttons on a controller... Which do you think is easier to get used to? (tip, it's not the keyboard)
Also, I think you are lacking technical knowledge. A modern Joystick (such as those in XBox 360 Controllers) can recognize 360 Different degrees of direction and up to 100 different degrees of pull.
Of course, for practicality purposes, the lowest 20 degrees of pull are usually neutered out, to make for better controls.
Most modern games adapt the speed based on the pull and change the animation at certain thresholds. 21-40 sneaking, 41-70 Walking, 71-100 Running.
Fluent motion, very comfortable.
For aiming, there are different acceleration algorithms that can be applied to increase the precision. Most famous user of this, would be Mass Effect 3. Trust me, headshots are real easy in that game, even on a controller... and no, this has nothing to do with aim-assist, which I turn off.
Also, don't forget the triggers, they can measure different degrees of pull as well... a mouse can't.