I appreciate your frustration with this. I think you need to understand it from their point of view. You say you are only needle phobia specific. What you don't seem to be taking into consideration enough is that you actually are fainting through a stimuli that affects your state of consciousness. There are a lot of things that can potentially set off an episode that at this stage you are unaware of. It could be a major weather event, system failure, inflight emergency. You just don't know. It hasn't happened yet but it could, and that's a risk the authorities just can't take lightly.