Friend, Japan started that war and refused to surrender. The American people literally did not want to participate in that specific war.

The USA is really fucking good at killing people. Japan knew this and they still decided to attack.

Loss of civilian life is unavoidable when two countries initiate a full scale war. Does it suck to be on the losing end of that? Absolutely. Unfortunately, at the time, war consisted of bombing and ground warfare. Japan seemed to have no plans to leave the USA alone so the American hand was forced to pick between the few very bad options. All of them would result in a dramatic loss of life.