Here's why:
* Astrology is based on tradition: The Western zodiac system has been used for centuries, and it's based on the positions of the Sun in the sky at the time of a person's birth. The twelve signs of the zodiac have specific dates assigned to them, and those dates are not changing.
* Ophiuchus is a constellation: Ophiuchus is a constellation in the night sky, just like the others that are associated with the zodiac signs. However, it's not part of the traditional zodiac system.
* The zodiac is not about constellations: The zodiac is about the Sun's apparent position in the sky relative to the Earth, not the actual constellations.
The misconception of Ophiuchus being a new zodiac sign is likely due to:
* The Earth's axial precession: The Earth's axis slowly shifts over time, which means that the Sun's position in the sky in relation to the constellations changes over centuries. This has led some people to think that the zodiac needs to be updated to reflect these changes.
* Misinterpretations of scientific information: Some people have misunderstood scientific explanations about the Earth's precession and its impact on constellations to think that the zodiac needs to be changed.
In conclusion, the traditional zodiac system remains the same. Ophiuchus is a constellation but not a zodiac sign. The zodiac is based on ancient traditions and has not been updated or changed.