To say books are an environmental detriment is incorrect; wood (paper) is one of the most renewable of resources, and when harvested responsibly (as is done in the US on the whole), it actually creates a net of more trees planted than would otherwise exist in our modern society.
Arguably, the plastics and battery chemicals of ebook readers is more damaging to our planet. Not that I think it's a particular concern.
To your last three paragraphs, I agree.