To some extent losing anonymity is the cost of living in a society. Owning property, the entire financial system, the entire legal system, huge portions of civizilation depend on reliable identification.

Scanning cards is fine with me as long as it’s just a validity check but I can’t say I trust Kroger to not build a database of spending habits, for example, so to some extent I share your discomfort. But I think it’s a small concern compared to the way we use cards to pay for everything now. Cash is the king of anonymous consumption.