I think “genociding” is being a bit pedantic. The shop keeper you are romanticizing was often a local inventory of goods. You were just a sale and they made a living on the arbitrage of goods. Not even all American made goods.
They weren’t always knowledgeable staff with a smile that remembered you and your family. I wish it was the case but I’m afraid it wasn’t.
So, not all shops are gone. How do we reconcile that? Is it that the ones that could not be replaced and/or provided more value than amazon have remained?
Shopkeepers have been around for a long time, genociding them may not be wise.
Strictly as an ecological approach, no value judgement. Sparrow killing backfired on paradise builders.