Astrologers are in many ways very much like scientists. There are as many "expert" and contradictory opinions, views and interpretations within the (ancient and vast) field of astrology as there are within any of the more modern social "sciences". Some astrologers may indeed consider their field of expertise to be "testable", "amenable" to the scientific method. Others do not. And in the end, it doesn't really matter.

What matters is that throughout the ages, those who study it seriously and use it wisely find that astrology works very well indeed. With or without scientific blessings, approval, explanations or confirmation.