I'm guessing you haven't driven a 'modern' car with an auto box recently.
Vauxhalls own AF33 box is a 5 speed with triptronic, no flappy paddles its a push the stick over and manually shove the lever up and down. It is every bit as good as a manual....
Yes, they are getting better (in the wrong wheel drive world!) but still nowhere near a manual IMHO.
You "make a request" to change gear using the stick, but still have no real control over the change other than whether it's up or down. The box decides exactly when it'll change, how much torque reduction to use, how hard to make the change, etc.
Let's say you got a bit deeper into a fast bend than you intended before changing down. With a manual you would realise this and make sure the change was subtle enough not to unsettle the car, perhaps add a blip of the throttle to match the revs, and be gentle as you come off the clutch. With an auto you are a passenger at this point.
I still maintain that a manual is what you want for enthusiastic driving, and with an auto you might as well save the effort, stick it in "D" and enjoy the scenery - IMHO, of course.

Kevin