I agree, when you think about it...... Personally though if not
thinking about it, my natural inclination is to pull back, which is how the Leaf works. I think it's because that is how floor shift automatics work, you pull it backward to shift into drive. Another reason may be if your hand is holding the mouse and you step on the gas hard, your hand naturally goes back(inertia?)
Of course most/all?? floor shift stick cars you push the stick forward for 1st gear to go forward, so in that respect the Leaf is backward.
Again personally I didn't think twice about it until I was teaching my daughter to drive for the first time, in my Leaf. I told her to pull back on the mouse to go forward and to push forward on the mouse to go into reverse, to which she said "why not forward to go forward, backward to backward"
Don't have CC on my S so I can't comment on that quirk.