>What happens to the mom and pop coffee shop or the grocery store that charges more than Amazon Fresh?

Coffee shops aren't known for being places to get cheap groceries; they're places where you get fancy drinks and/or snacks and hang out and talk to your friends or use the WiFi. In other words, coffee shops are selling an experience, not a fungible good.

If a coffee shop goes out of business because of an online seller, they must have been offering a really lousy experience.