As with all rules, the question is perhaps not "how can we explait unclarity", even if that is indeed also interesting as it sports advancements of rules clarifications.The question is "what did the designers intend?" What are they trying to achive? That's really the only interesting part if one wants to get the most out of the game.
If I had to guess it would be that their intention was to make the planes always move around in contrast to helis. If not, you end up with all kinds of obscure and in 99% of the scenarios - functionless - actions mentioned in this thread, where you move back and forth to "not move" at all etc. It seems as if in absurdum arguments speak against such notions. Then again, I wouldn't know as I can't read minds, but I'm convinces this will be resolved in FAQ or 2:nd revision.
What seems to matter also is what other action can you make, without making it or by faking it? For example, why would it be logical to accept that you perform a movement action without moving the miniature (granted there are legal moves to make of course), when there seems to be no such equivalents when it comes to say the attack action?
You can't perform an attack action unless there is a valid target. You'd have to have line of sight, and weapons reach, to actually perform the attack action. Notice the wording here: Action. It suggests thats something "is happening." So, let's say we all agree on that, for the sake of argument. In which case it seems coherent to suggest that you can't perform a move action without actually moving the miniature.
Here it is also important to differentiate your personal "wish" or "desire" to perform the move/attack action: It is one thing to want to or intend to perform action x. It is another thing to actually be able to legally perform the action. For example, I maybe usually want to perform attack actions, but many times there are no valid targets to perform the actions on, hence the actions can't be performed.
I'm not suggesting that all this is "the way" to understand the rules as they clearly need some explaining, but it's how I'd go about it in a logical way and also to keep the fun in the game.