I wonder if Lucas had just had only male sand-people (who are the only ones we ever saw before AOTC) being cut down would anyone be reacting to that? Not much I think hence why Lucas specifically had them in there and have Anakin admit it to her. As I have said before Anakin is about trying to fix things beyond his control while Padme does the same to people but in a more realistic way. Her problem might be that she hangs on too long and believes in people too much even when they don't in themselves which is another Luke trait in regards to Padme to Anakin and Luke to Vader. What I find odd is when there is the talk of what Padme should do about Anakin in regards to the sand-people (get away etc) when comparing that to Luke's actions to what he does later as Vader for which there is no remorse at all.