Why were the Indians necessary to San Buenaventura?

The Indians were necessary to San Buenaventura primarily for their knowledge of the local environment and resources, which facilitated agriculture and trade. They played a crucial role in the labor force, helping to build and maintain the mission's infrastructure. Additionally, their skills in fishing, hunting, and gathering were essential for the survival of the mission's inhabitants. Overall, their integration into the mission system was vital for its success and sustainability.