Understand it is not canon. But still it has to stick to the key plan. The issue is they really cut corner to set a trap so the canon is finished but nothing

Understand it is not canon. But still it has to stick to the key plan. The issue is they really cut corner to set a trap so the canon is finished but nothing else. There is no need of flying or crew as it is a stationary canon. In fact later the whole planet is a canon idea is formed. Hence, people hated totalitarian country forger that they might not function forever but can be enough to invade a country without realistic way of political success. Still they did. Then failure meant they refine their goal and attack strategy until if all fail they form a trap with whatever is functioning. Then suddenly it occur to them they do not need to fly … When Chuan invade Taiwan it is not because it is a success in whatsoever but would be a bitter success (unless Taiwan just surrender and fall like Hong Kong). And if not they will redefine … until the emperor is dead and in fact even so the empire does not die (like the chinese empire never died just change emperor). Whilst 7-9 is really bad, it is not totally broken. There could be a management story for the evil. Can the good guys learnt … ? Not really in 7-9 … other than just want to repeat and being lazy in script writing, there might be something more going on.