I absolutely agree with Sei No Senshi and 23.The planets, signs, houses, points, and aspects have all the questions/answers we could possibly try to comprehend as mere humans, and the most intelligent astrologer with a lifetime of studying those facets would still have plenty of room for expanding their knowledge within them.
I don't bother with asteroids, and staying away from them is my advice. Thousands of asteroids only confound astrology, there's probably an asteroid for underwater basket weaving.
Astrology can be a daunting examination, and I'm just a student.
Still, I feel the study of asteroids is an act of desperation for people who are looking to justify/satisfy some part of themselves when they don't have the education to recognize it in the basic chart.