CV Donator, I'm afraid the application form is part of a selection procedure and that is what companies use to call people forward. From the answers you put down on the form they will have made up their mind. Perhaps you should have examined your answers, for the reason you were not selected, rather than pondering on other reasons. After all, the procedure works fine for everyone else!
As those that are experienced in the job will testify, there is more to flying than "you either got it or you haven't"!