Why is astrology considered an occult practice from a Christian theological perspective, even though the Magi followed a star?

Astrology is often categorized as an occult practice in Christian theology, especially in Protestant and evangelical circles. I’m trying to understand the theological basis for this. Why is astrology — the practice of interpreting celestial bodies for guidance or insight — considered spiritually dangerous or forbidden? Is it primarily because it involves divination or seeking knowledge apart from God? I'm also curious how this view is reconciled with the story of the Magi in Matthew 2:1–12, who followed a star to find the newborn Jesus. The Magi are often described as astrologers or wise men from the East who interpreted celestial signs. If astrology is inherently occult, why would God use something resembling it (a star as a sign) to guide them? Are there biblical or doctrinal distinctions made between the Magi's actions and the kind of astrology that is condemned in Scripture (e.g., Isaiah 47, Deuteronomy 18)? I’m looking for a response grounded in Christian theology, not just personal opinions.