Ok, but robot pickers are expensive capital costs, and are set up to work in a warehouse environment with boxes, not a retail store full of soft goods and shelves. Unless you’re talking about recapitalizing the entire store to be a wearhouse, in which case there is a huge opportunity cost in regards to using good retail realestate for a warehouse.
Gonna have to use human pickers unless the grocery store is willing to completely recapitalize and the margins might not justify the high cost of retail real estate.