Because there is no "pilot"? 
(They can't?)
wrongway
Nope. I tried once, and they just banked REAL shallow-like.

I've also noticed that their control surfaces don't move.

They're also ugly on the takeoff run.
They also stop WAY too fast.
They also can't drop below about 100 mph.
Their throttle settings also don't change.
They also NEVER run out of gas. Until youbail. THEN the engines die.
-.-