The AOW concept was created by the Los Angeles County program in the mid 1960s and then adopted by NAUI, which had its origin in that program. It was later adopted by PADI. The original purpose of the program was to combat a problem with diving--students were getting certified, doing a few dives, and then quitting. The idea was that introducing them to a few new skills and a variety of different diving experiences would hopefully spark some area of interest that would keep them diving. It was called "advanced" because when it was created, it was quite literally the most advanced course available (other than instructor).
Today many people have trouble with the fact that it is still called advanced, even though there are so many much more advanced certifications available. The PADI program stays true to the original intent of introducing the diver to a variety of experiences that may spark an interest. If you like one of the dives you chose, you can go on and do the extra work required to get the specialty certification. If you don't like it, then don't waste the time and money on the specialty and check out something different.
Today many people have trouble with the fact that it is still called advanced, even though there are so many much more advanced certifications available. The PADI program stays true to the original intent of introducing the diver to a variety of experiences that may spark an interest. If you like one of the dives you chose, you can go on and do the extra work required to get the specialty certification. If you don't like it, then don't waste the time and money on the specialty and check out something different.