I'm sorry. I just can't understand getting AOW with 5 introductory dives. SDI requires full courses and a minimum number of dives. Even then the certs you get are learners permits. I simply don't see how you can master what you need for deep diving (or any of the other specialities) in a single exploratory dive.
The purpose of the AOW dives always was to introduce divers to different aspects of diving, not to make them masters of any of them. According to the History of NAUI, written by Los Angeles County and NAUI founder Al Tillman (NAUI #1), the AOW course was first created by Los Angeles County because they noted a large number of divers got certified and stopped diving. They thought introducing a number of different aspects of diving would renew their interest. NAUI followed suit for the same reason. PADI came later.