If that really was the case, why are aircraft (and to be honest, so many other things) a hard-counter to tanks and the likes, whereas the only hard counter the aircraft have, is another aircraft. Another issue with this is, that essentially, all you need to be good at, is flying. Once you reach a certain skill level with your vehicle (or anything really) you can start using your superior skill-level/experience to make up for faults in the weapon system you are using, and perhaps make up for inherent advantages other weapon systems have over you. This risks having people that are essentially un-kill-able, except for the most extreme of odds. To make up for that, certain hard counters are typically introduced, which gives the game more of a rock-paper-scissors feeling, and enables most people to combat most threats to a certain degree. However, by having the only hard-counters to aircraft being other aircraft, you are essentially impervious in the air, except for when you make terrible decisions (which costs any vehicle their lives). The difference is, tanks for instance, can die without being able to really do anything, even if they were paying attention to their surroundings, simply by virtue of the aircraft being their hard-counter (and no one on the tanks faction wanted to either pull AA or saw the threat, since the tank wasn't RIGHT next to them), and it isn't only aircraft able to do such things. I'm quite proficient with my Tank Mines, and placing them in places where they are impossible (or nearly) to see before you actually hit them. But of course, pilots shouldn't have to fear such things, as long as they aren't making themselves easy targets (and what happens to tanks in such situations? They die before they can reach cover, or get C4'ed, depending on the situation).