Legit point. Yet, I don’t think the benefit of that type of acknowledgement of environmental impact seeks to deny the total worth of that industry. (As with whaling for NE areas, it is a unique and rich layer to the cities character). But it seeks to identify the dangers of lack of balance.
As with Manifest Destiny, lost cultures and targeted genocide are not minutia, they are aspects of history. Ignoring them in a desire to only justify resultant effects is just simply ignoring history. Imo, the most effective way to teach manifest destiny is by focusing on both the positive and negative. It’s not in an effort to somehow indicate to the student that Manifest Destiny was bad, but rather an effort to force critical thinking within the student about Manifest Destiny as a historical event.
As I said before, the goal is to foster critical thinking and thorough analysis......and not allowing a rigid stance in regards to cultural righteousness.
Although it seems that is what you seek, as great as America is.....to me, it’s not education but rather indoctrination. Good education doesn’t liberalize, it expands the scope of analysis.