With out the computer assisting the pilot, that airplane would be impossible to fly. The B-2 take hundreds, if not thousands, of inputs a second in determining exactly where to position the flight controls. I don't know about you, but I could probably react to about 5 inputs a second. Also, the B-2 was designed for a specific job... fly somewhere, be invisible, blow up bad guys, fly away. It's easy to make an airplane that can drop bombs. The B-52 has been doing it forever. The difficulty is making the airplane stealthy. That means standard pitot tubes won't work (they reflect RADAR), and it can't fly in rain (rain degrades the fragile paint). Of course the engineers could make the airplane more robust by making it all weather and stable enough to hand fly buy then you'd just have a $2,000,000,000 B-52.