why might the Spanish have felt it important to train the natives of California for a "European colonial society"?

The Spaniards trained California natives for a "European Colonial society" for three reasons: 1. To support the agricultural and livestock development of the territory. 2. To contribute to the growth and development of the Franciscan missions. 3. To diminish the negative effect on the autochthonous settlers that began to disappear, with the establishment of parcels to work the land.