Those are superstitions. Astrology is not superstition. Not even close. Astrology is a language. It exists. Like Estonian or French. It just plain exists. Like hard boiled eggs or chutney. For some people, languages that they are unable to read or converse in, constitute a discomfiting threat. When we hear friends chatting in a language that we don't know and we are present, we are wont to imagine they are talking about us. This is a kind of natural paranoia. We cannot understand. So we feel left out and perhaps even targeted - a victim.
Astrology, like any language, does have to be learned in order to be used. That's why some people are astrologers and other have other learnèd professions such as doctors or butchers or space engineers.
An astrologer might tell you that your Sun in Leo means that you tend to want to be in the spotlight, but if your rising sign is Pisces, that Leo need for the spotlight might be mitigated. That's part of the "language" of Astrology.
This sort of Astro diagnosis -- "You're a Leo but you have Pisces rising" -- is not dissimilar to when a doctor tells you that the lump on your wrist looks like a cyst, but if the tests come out positive, it might be something more serious. He looks at the cystic physical evidence, but he also digs further to find out if it might be something more dangerous.
The language of Astrology has been much shushed and derided by a sector of the population we refer to as "scientists". These are people who believe that science (another language) is the pathway to understanding every human ill, including mental, emotional and physical ailments - and to conquering and refining and owning whatever commodity is available to man (Space flight for example or improved hard boiled eggs.)
But squelching a language doesn't always put it out of existence. Breton and Basque and Catalan do thrive and are now taught in schools. Astrology has survived the great science squelch. It remains a means of communication among peoples as well as a method of both diagnosing and better understanding the human condition. It is also now taught at La Sorbonne in Paris and at other universities worldwide.
Astrology is not in competition with science. It's just there alongside it the way that TV is there alongside the Internet. The two media must co-exist. They cannot afford to be at war. The Internet will win. It's bigger. And younger. TV knows that fact the way that Astrology knows that it must coexist with science because if there was a war between them Science would win. It's bigger. And younger.
We know there is often wisdom in what is ancient. Astrology has been around a long time and continues to exist. Some people study it and are able to use it in their work and daily lives. Other people don't study it sufficiently to become astrologers. But they dabble and they enjoy dabbling. Other people (most people) consult astrologers. They are the clients or the patients or the "consulters" who come to people like me for advice and information about their astrological charts: Who am I? What should I do about my mother-in-law's interfering in my marriage? How can I get a divorce and keep my children? Why do I not have self-confidence? Where am I making my mistakes and why do I keep making them over and over again?
What some skeptical people (the science-blinded or otherwise prejudiced) don't know is that the answers to all of those questions are sitting right there in peoples' astrological charts. Moreover, the fact that most of us don't know how to read our charts and don't speak the language of Astrology or know how to interpret the symbols, doesn't mean that the answers are not there. They are.