Top attack is primarily a way to exploit the fact that most tanks are weakly armored on top. The speed (not KE, per se) trade off make sense because it makes a

Top attack is primarily a way to exploit the fact that most tanks are weakly armored on top. The speed (not KE, per se) trade off make sense because it makes a kill more likely by positioning the warhead for better penetration. That doesn't make sense for aircraft - even slow drones which are still a lot faster than tanks and move in 3 dimensions. Faster weapons means less time for the target to escape, which is always better even when guided missiles.