Astrology is the whipping boy of modern intellectuals. For some reason, those with a bias towards rationalism feel the need to vociferously attack astrology from time to time. Let us pre-suppose for the purposes of this post that astrology has no predictive value and that its forecasts and models are in effect random. Is this sufficient cause to attack astrology?
I contend that it is not. Why should people not be free to play a 'game of fate'? This is, after all, what is meant by alea. Most people read horoscopes for entertainment and amusement; if a particular prediction leads to someone taking action, it is likely because they are already considering taking action - the horoscope is a spur to action, not an order to be taken.
Furthermore, why should it be inherently superior, as some rationalists contend, to favour making life decisions on the basis of theory (which is frequently wrong and we have no way of knowing in advance when this is so) instead of on the basis of chance (which is also frequently wrong, and equally unpredictable)? People should be free to play their lives however they wish.
Evans-Pritchard, in respect of the culture of the Zande, says "I may remark that I found this [i.e. consulting oracles for day-to-day decisions] as satisfactory a way of running my home and affairs as any other I know of." One can also consider the influence of the I Ching in China; the skill in its use is in interpretation: the random element can be seen as an aid to inducing original thought.
(As an aside, Christians may wish to oppose divination on the basis of Old Testament 'laws', but such reasoning is questionable. For instance, Leviticus 19:19 clearly rules against garments made from two types of thread, a 'law' which is rarely enforced by anyone outside of Amish communities. I suggest Christians should understand that parts of the Old Testament record the cultural laws of early Judaic society, and not instructions from God intended for modern Christians to follow. Indeed, Jesus' ministry clearly lays down the 'new convenant': "love one another, as I have loved you" Enforcing this 'law' must surely please God more than enforcing archaic social restrictions that were probably originally intended to prevent the dilution of the authority of the priesthood).
I have previously noted that those who use astrology share a common language which allows them to communicate ideas that otherwise could not be exchanged. Here, I suggest that astrology is also both a reasonable entertainment, and a potential source of 'life noise' by which one may prevent oneself from falling into a rut by occasionally considering courses of action that are suggested at random.
I do not personally use astrology in my life, but I can see no sensible reason to oppose it. We should be free to live as we choose, and choose how we live.