But the people buying it all still aren't doing anything wrong. If anyone is to blame, it's your local shops for not keeping enough stock. If they can sell a hundred times as much formula then that's what they should be ordering in. Everyone would be happy then - your granddaughter, you, the Chinese, the shopkeepers and the manufacturers.
As for the breast v formula argument - needs must. I've done both in my time, as have my children. There's no discernible difference between them as they've grown up. We're lucky enough in this country to have the conditions to make FF safe.