It's annoying when you crash your wing and you're nowhere close to the airport, so you're basically forced to go back and waste a couple of minutes just so you can fly properly again..
Title pretty much says everything - being able to use vehicle repair kits on aircrafts, the same way we can use them for ground vehicles. Using the same one or making a special one for aircrafts, doesn't really matter, as long as we're able to carry one in case of an emergency.