That looks like a fallacy reasoning. In the same way if we would compare any harm that is happening on our planet to let say: Solar system, galaxy or universe, combined with age of a star, so it would be negligible and therefore justifiable?

Collateral damage is justifiable unless you are not that damage isn't it?

Better reasoning could begin with the question: would I leave my comfortable home, go there, and live there in community where water is contaminated by lithium mining sludge. Would I drink that water every day? Is there anyone who is suffering so I could enjoy comfortable life?