It's more about preparing fresh food at scale. It's really hard to handle large amounts of raw veggies (cilantro, lettuce, and tomatoes). If these get contamina

It's more about preparing fresh food at scale. It's really hard to handle large amounts of raw veggies (cilantro, lettuce, and tomatoes). If these get contaminated in the field, a restaurant kitchen can't clean them well enough. Restaurants that process their ingredients in a central kitchen can put ingredients through more aggressive sanitation treatments, and deliver them to stores pre-processed. But, that doesn't come across as particularly fresh or local.