Except yes? Who cares about a planet without the biosphere? There are literally billions of such rocks. There is something different between Earth and other planet and that's what people are taking about destroying.

Extinctions happened were natural, nobody could stop it. This time it's because of greed and selfishness. It could have been stopped but not and still going on even though we know it. Don't justify this time with before.

Also we are not debating whether that happened before or not. Some (mostly american from what I've seen) people will take any excuse to justify it.