Amazon et. al. has not removed any of the interactions you've described, it's only changed shape. As fewer workers are needed to perform retail sales that labor is freed to perform other human interactive services. Many of those people now work in healthcare which is very hands on social interaction. There's more restaurants and bars, popular centers for social interaction. Lamenting the fall of mom and pop retail establishments is like lamenting the loss of the milk man. The new system is better and the milk man is now your masseuse, or physical therapist, or details your car, or provides some other valuable service for you.

People said it was "late stage capitalism" when Walmart destroyed the mom and pop.. and frankly that's who really did it. But that was a generation ago. Amazon is really just destroying Walmart. But more to the point whatever social fabric WalMart might have damaged it's nothing compared to the destruction of the family and social bonds that falls right at the feet of socialist policies that I've already mentioned. Capitalism is not the culprit here, socialism has been.