Tungx2,
Their biggest problem is trying to find enough people rather than having too many so don't worry about competing against other interviewees for a place.
As for previous flying experience it really doesn't matter to them whether you have it or not. The same goes for your previous job. The interviewers are more interested in knowing why you decide on a change of career and not what related qualifications you have or not have.
What's unique about the Cadet programme is that most cadets were doing something completely different from flying an aeroplane before they joined and yet they cope with the course just as well. The recruitment people recognise this and so they're not looking for pilots but those with potential and have thought thoroughly about becoming an airline pilot.
Regards,
Guru