Prophecy is part of the ancient desire for omens and magic abilities in soothsayers to enlighten us. Old Mother Shipton's prophecy from the sixteenth century predicting the end of the world for 1881 had people in despair of anticipation in England. Suspiciously close in time to the prophecy shenanigans of CT Russell I think.... (1874/1878 and first Watchtower 1879)
People always would like to know the future but there is no possible way since we cannot time travel. At best we can weigh the evidence and make a guess with the observations of prevailing courses of events -- but no one can make a useful prophecy of the future with a certainty of its happening.
As Waton points out^, educated star gazers could predict eclipses so astrologers would feel entitled to wield authority in the department of prophecy, after all apparent evidence for their mystical ability was at hand!
There are no unambiguous USEFUL prophecies to be found in the Bible.
With "holy" literature, the reader is conned into thinking that it is all honest text but alas most Bible prophecies are those done and dusted so to speak, cleverly written after the manifest fulfillment!
Prophecy cannot negate free will as it is merely a superstition.