While it can indeed be helpful as an indication, cost often doesn't factor in externalities such as pollution during production, and recycling after use. Paper has much fewer problems in those areas.
Nothing to see here and there can't be any possible negative consequences when people are making so much money.
Utility is key and RFID has a lot of advantages over bar codes (and QR 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.
Perhaps not for files, but definitely for equipment.
My diving mask and backpack certainly went through optical.