This is a breakdown with the timeline of events showing that it probably wasn’t necessary and didn’t save more lives. You yourself just said they lost their military forces so how were they a threat? Japanese surrender was inevitable, nuclear force on civilian targets is never justifiable.
As far as I understand it, the flavor and smell of garlic that we experience is made of mostly volatile compounds that get broken down with heat. So the longer garlic is cooked the less of that pungent smell and flavor is in your final dish. So if you want more garlic flavor in your dishes, you can add it later in the cooking process.