Again, there's a lot more to think about. What about prices? Even if manufacturing costs remain the same, costs for consumers are likely to rise per unit quality in the absence of meaningful competition. There will also be additional downward pressure on prices paid to those factories if there are fewer (or one one) buyer.
As I said before, I'm not convinced that all of these things will actually happen. But the answer can't be as simple as "who cares...Amazon is just cutting out the middle man."
It doesn't matter. The power strips are still being manufactured at the same factory in China.