Spoken to a few people involved with these courses and apparently a lot of the people often only get as far as the gate and don't actually end up getting on the plane.
Seems like a lot of money to throw at something and then not go through with it in the end. If being surrounded by hundreds of other passengers in the airport who are just getting on with their flight as well as being reassured by professional and experienced staff still doesn't convince you then perhaps flying just isn't for you...