Why was Arabia isolated from the benefits of silk road?

Arabia was not totally isolated from benefits of silk road. In fact, the silk road did benefit Arabia albeit to a limited extent. This is because;

Geographical Position: Arabia is located on the southwestern edge of Asia, and it is not directly on the main routes of the Silk Road. The major Silk Road routes passed through Central Asia, China, and the Middle East, and while some branches extended to the Red Sea and the Persian Gulf, they did not significantly impact Arabia.

Desert Terrain: Much of Arabia is covered by vast deserts, such as the Arabian Desert and the Empty Quarter. These harsh environments made it difficult for trade caravans to cross Arabia, and as a result, trade routes tended to bypass the region.

Limited Resources: Arabia did not have a lot of valuable resources that were in high demand along the Silk Road. While the region did produce some incense and spices, these were not as highly valued as other goods such as silk, porcelain, and gold, which were found in other parts of Asia.

Political and Cultural Factors: The political and cultural landscape of Arabia also played a role in its limited involvement in the Silk Road. The region was divided into various tribes and kingdoms, which often engaged in conflicts and wars. This instability made it less attractive for merchants and traders to travel through the region.

Despite these challenges, some benefits of the Silk Road did reach Arabia. For example, some luxury goods such as silk and spices did make their way to Arabia through trade with neighboring regions. Additionally, the Silk Road contributed to the exchange of ideas and technologies, such as the introduction of papermaking and astronomy to the region.