It's fun to bash on great accumulations of power, that's my instinct too.
But despite all the controversial things Amazon has done, they still seem to live up to their #1 leadership principle [0]:
Customer Obsession - Leaders start with the customer and work backwards. They work vigorously to earn and keep customer trust. Although leaders pay attention to competitors, they obsess over customers.
Since the first result of the WF acquisition is lower prices for customers, it looks like that tradition continues.
If Amazon makes good on their third principle, "Invent and Simplify", they'll fund lower prices with higher efficiency and greatly expand the number of people who can afford WF quality.