I do not think Cathay Pacific is open to everyone.
Directly from their Cadet Pilot Program:
"To qualify for our Cadet Pilot Programme, you must be at least 18 years old and a Hong Kong resident. You must be at least 1.6m tall, be physically fit, and possess an excellent command of English."
It states that you need to be a Hong Kong resident, not a Hong Kong citizen. Does this make any difference?