What astrology can tell you is what you will encounter in the future so that you can be better prepared. Some people take it with a positive attitude. Some others blame astrology for planting the seed of fear in their minds creating self-fulfilling profecy.
Once I told a client to be careful with her health particularly towards a certain part of her body. Well, she blamed me after one year that my advice made her thinking of the possibility of getting sick and finally she was diagnosed to have a tumor in that particular area of her body.
To know or not to know, that is her question.
To tell or not to tell, that beomes my question.