Yes but they operate automatically in "auto" mode, and technically the driver isn't operating the clutch, it's done automatically by a computer. I see your point though.
I disagree. Unless you can prove me wrong, manual shifts in a trans like that are just to agressive for corners. Plus a majority of them don't even have enough gears.
Not to mention "fully built" trans' are usually in cars that don't handle
There is no way in hell you'll ever see a circuit, drift, enduro, le mans, superbike, v8 supercars, motoGP etc. car/bike with a fully mechanical automatic trans. Because they aren't faster. Except in a straight line.
Not to mention they don't offer enough control, and are quite bulky to operate.