[dragonwriter]

> Regardless of what you think of those first shots from Apollo 8, you have to admit they put things into a different perspective for a lot of people.

“Regardless of what you think about X, you must think Y about X” is a particularly tiresome rhetorical device, but its also being deployed as part of a motte-and-bailey argument here.

> It's not like John Muir needed to see the Blue Marble image to start his movement. It's just so many more people did

Blue Marble (1990) is a completely different image than Earthrise (1968), and Earthrise was only adopted as a symbol of the environmental movement because the movement was already ascendant when it came out, not because it was the trigger for it.