Comment by SoftTalker

Restaurants are one of the classic immigrant paths to upward mobility. We don't want to make that too hard.

By all means, get a license, food handler permit, etc. and know and practice good food safety, and buy ingredients from legitimate wholesalers. But at some point you don't have visibility into the supply chain and it's not reasonable to expect Joe's Taco Truck to know which specific farms produced their lettuce.