Yeah, but those gearboxes are actually more closely related to manual transmissions. They have a clutch instead of a torque converter, and multiple gears instead of a planetary gear system. The computer does neat things in addition to engaging and releasing the clutch, like preventing you from doing stupid things like you said, and also does rev-matching, so it effectively heel-and-toes it for you.

Those things are way cool. I still prefer doing it by hand, but they're actually technical improvements, rather than just a middle ground between auto and manual.