Not stupid, it's basically all about the physics and characteristics of a 747 aircraft. First it wasn't at the right speed to pull up and climb out, second, if it were to try and turn on the ground it would have been useless. The visibility was low, so the closure rate was about 2 to 3 seconds from the time they seen the other 747. That is not enough time to turn that huge plane. And if they did try, all it would do is skid on an angle and ultimately still hit the other plane. Simply put, it was too slow to takeoff and too fast to turn on the ground.