Like others here I very much doubt most of those named were astrologers, but I'd prefer to address the underlying assumption.
Knowledge is cumulative. Every generation discovers and understands a little more about the world than the previous one, hands what they've learned on to their descendants who build on it and discover and understand a little more and hand that on ... There have been dark times when knowledge has been lost, or even deliberately suppressed, but the general trend over the last several thousand years has been for knowledge and understanding to grow whilst ignorance and superstition decrease. As a result you and I have available to us a veritable mountain of knowledge and understanding. Much of it was not available to previous generations, not even the great scientists of previous generations, but all of it is available to us. Isn't that wonderful?
The people who invented astrology believed that the earth was flat, the earth went round the sun, the stars were points of light on a crystal sphere and the planets were gods. They didn't believe these things because they were stupid - they weren't stupid, they were the brightest minds of their generation - they believed them because they were ignorant. If all you know about the world is what you can personally see and hear then astrology seems perfectly reasonable, and the people who invented it had every excuse for believing it. But you and I have no such excuse. You and I know what the stars and planets really are, we know the laws of nature which really determine how the world unfolds, we know how and why our pattern-seeking brains evolved and how easily our perceptions can consequently be fooled, etc etc. Or at least we
can know all that, if we choose to use google or pop along to our local library to find out.
Now I happen to believe that our hard-won store of knowledge and understanding is civilisation's greatest achievement. Humanity's greatest achievement. So as far as I'm concerned, anyone who deliberately turns their back on it and actually chooses to waste their time faffing about in the last remaining dregs of ignorance and superstition is essentially spitting in the eye of every single one of their own ancestors who has ever contributed a smidgen of knowledge or understanding to that store. They are pissing on humanity's greatest achievement. That upsets me, it is to me what I imagine blasphemy is to a devout religious believer. When I see something like the cargo cult science - the calculation of 'transits', the pseudoscientific gibberish about magnetic resonances, the sheer inexcusable ignorance of basic physics - with which you try to justify claims to 'know' things for which there is not a shred of evidence I just want to sit down and weep.
ETA: Oh god. I just found this in the moderated thread, posted by Astro Teacher:
Of all the urban myths, this is the one that puzzles me the most. Do 90% of the people who suffer strokes or serious brain injury just carry on regardless? You only need to think about it for a few seconds to realise that this cannot possible be true. It beggars belief that anyone could post such a statement and still expect to taken seriously.
For the record:
http://www.snopes.com/science/stats/10percent.asp