Ink is cheaper.

I've worked in wholesale logistics (backend for inventory management) for many years way back when and let me tell you, cost of ink vs cost of a chip the least of the problems. Barcodes (and QR codes as used here) have two major flaws: reading them is challenging (works fine if the package is undamaged and you TRUST that it contains what it says on the box) and they're still just a number. RFID can help with both these issues and the savings from that can outweigh the additional cost by a lot.

Utility is key and RFID has a lot of advantages over bar codes (and QR codes).

Not if you include the cost of the employee scanning the bar codes.

Even if the customers does it, it still takes a lot more time and space than scanning a basket full of RFIDs labels. It literally takes seconds.